I just noticed that the 3.5 FAQ was updated to include Factotums (on page 17). For what it's worth, this includes the following:
1) Unspent inspiration points are replaced when the factotum returns to his full number of points once an encounter ends.
2) Factotums have no spell list, and thus require UMD for Wizard/Sorcerer scrolls.
3) You can use all inspiration fueled abilities outside combat, and it specifically states that an encounter "includes any other significant event in the game such as stopping to bash down a door, navigating a tricky bridge, or dealing with a trap."
4) You can use Cunning Strike multiple times per round for more than 1d6 sneak attack damage.
5) You can use Cunning Brilliance to get all the sneak attack of a Rogue. Furthermore, any ability that doesn't seem magical is assumed to be Ex and thus usable, which clarifies stuff like Fighter feats that are not magical but don't explicitly say they're Ex. This is a handy clarification.
6) Clarification on the number spells cast (no surprise here)
And here's the big one: there's a change on one page 47 that says that "ability damage" is not damage, and thus can't be increased by the Factotum's Int to damage ability. Ouchie.
It should be noted that the FAQs are not exactly perfect (they such silliness as saying that Precocious Apprentice can't be used to qualify for PrCs at all because it doesn't actually give you the inherent ability to cast 2nd level spells). But still, it's there.
JaronK