I know I haven't been around the boards much the past six months, but here is a gift that I have spent some free time developing
for the Dresden Files RPG.  The basic premise that I started with was a Medieval Knight of the Cross versus the Denarians
Campaign.

The setting is the 14th century (some of the worst of the Dark Ages) during the typhus epidemics.  This is the sort of unrest that
would bring in both Nicodemus and his wife and their associated groups.  The Denarians' goal is the one relic of Christ that has
not appeared in the Dresden Files Universe, the Spear Longinus.  The White Council of the time should be closely integrated with
the Church, as they were the primary educational source.  The party, depending on the number of characters you're willing to
support, should consist of at least two if not all three of the Knights, possibly several wizards/Churchmen (think Father Forthill
as a Council member), several members of the current Senior Council as young wizards, fleshed out with other arcane beings such as
fairies or other denizens of the Never Never.

I envision this scenario as the launching point of a long term campaign that could wander across Church dominated Western Europe as well as the Middle East. 

Sounds like an interesting series, but if Jim were using that system, there would be no need for the 6th Law.  I think applying the Time Wars physics would be more useful.

Actually viewing the past vs. acquiring knowledge in the present is probably a loophole in the 6th law, just as Sue was a loophole in the necromancy rule.  The laws seem to be absolute, until the Council gets involved and they go all loosy-goosy.  Besides the Black Staff (I know, the exception defines the rule), they teach young magicians anti-mental incursion defenses.  The problem is, by teaching someone to defend against something, you are teaching them how to do it as well. 

Real world example here: one of my organic chemistry labs in college was how to add a nitrile group to methyl bromate.  This had to be done in very controlled, very cold conditions.  One group is safe.  Two groups is safe.  Three groups makes this little compound called trinitrotoluene, thank you Mr. Nobel.  My teacher told us the story of this being done commercially by an inattentive lab tech who trusted the process and blew out a large portion of the building he was in.

<snip>Since the Gatekeeper is way more powerful and knowledgeable when it comes to time travel, he sends the player (and his allies) back to the point where the disturbance took place, in order for them to make things right. <snip>

So, Lucas Priest, Finn Delaney, and Andre de la Croix as Dresden File RPG  characters?  (See Simon Hawke's Time Wars.)

I don't think that's so much inherent to divinations in general as it is likely another instance of Harry being powerful but sloppy.  I rather suspect that it would, in fact, have been a Compel for Harry's character based on his 'magical style' aspect.  Other practitioners likely would have executed an equivalent spell substantially differently, and at least some of them would manage to avoid that particular issue.

Since the stated purpose of any focus is to improve precision and fine control, I would think that a focus as impressive as Little Chicago would drastically decrease Harry's sloppiness.  This is yet again an indication of Cowl's fundamental might and ability.

Further explaining my Heisenberg comment: If the act of observation does indeed affect the observed, we end up with your standard time travel nightmare.  Were the changes always intended to happen or did you actually impact the time flow?  For a beautiful example of this Ouroborous, I refer you to Marvel Comics "The Starbrand."

As far as using divination vs. conjuration and the 6th law, a non-problem solution to this would be the ectoplasmic reconstructions from the Sookie Stackhouse books where the caster creates an ectoplasmic "ghost" of the entire event, limited to the locus where cast.

I again thank you for an intriguing thread and dredging up some fond memories.

Four points,     all over the place, although all are relevant:

One of the more interesting Dresden games I have encountered was at Origins two years ago.  The concept borrowed from the old game  Nightlife where the characters were all members of a band and all changelings, set in set in NYC.  This demonstrated to the players  a path other than a Chicago-centric campaign.

As far as canon campaigns go, I am reminded of another Origins experience where I played in a GURPS game based on Gardner's Expendable universe.  Other than the GM, a close friend, I was the only one of 8 players who had read the books.  Thank God I ended up with the Explorer and the overkill suit! 

The canon vs non-canon campaign is something I have been wrestling with for 2 years.  The setting I have finally chosen to develop is sort of a hybrid.  The players are the trainees under Ramirez' tutelege.  This campaign has had its scope expanded by the last two books rather than the standard problem of a canon campaign where the next book can kick the underpinnings of an existing campaign out from under a GM.

Finally, I have been working on an Anita Blake conversion for the past 10 years.  The format I have ultimately decided upon predates Skin Trade, but was validated by this book.  Basically,   other major cities are forming their own versions of RPiT.  This allows continuity across different geographical locations as well as guest appearances by several major characters from the books.  This also solves the major power creep problem of someone wanting to play Anita.  I was truly concerned about this, as the same issue exists in the Sailor Moon RPG when someone insists on playing Usagi.