Ok figured some of you may be interested in this, this is all the factual information we have so far about SquareEnix's new MMO in development:
1. The game has been confirmed to be cross-platform and cross-region, meaning multiple nations on the same servers, once again.
2. The game will run off of SquareEnix's White Engine, same engine running the stunningly beautiful FFXIII.
3. Despite previous reports of a tentative PS3 release, it appears development is back on track for the PS3, as well as Xbox 360 and PC platforms.
4. Producer Hiromichi Tanaka has stated in one interview that they are not interested in drawing from the WoW audience for this title, and beating 8 million subscriptions appears to be the least of their worries. They just want us to enjoy the game.
5. There is one Tech Demo floating around the web from E3 2005 that I'm sure everyone here has seen already, this isn't considered in-game footage.
6. SquareEnix has stated this game will not be a Final Fantasy sequel, nor have they confirmed, or even hinted, that the title will take place in a different FF world (such as Ivalice).
7. Tanaka has mentioned that SE wants the new title to be able to co-exist with FFXI (in the real world), so expect contrast between the two titles. To what extent we do not know.
8. The EGM rumors from March 2007 have yet to be confirmed.
9. Tanaka has mentioned that SE is not waiting to see how FFXI's user base grows before putting info on this game out there, which could mean info will be coming very soon, ie: after the WoG release. (that's not a fact so don't quote me on that).
That's pretty much what we have so far, if I've missed anything you'll probably find it at SquareEnixMMO.com, it's basically a collection of every rumor,news tidbit, and article about the new MMO, so check it out. Thanks.
XI Wiki

