Well, i figured a refresher is a good thing to have every once in a while. I've read to forum rules for Obivion and this doesn't seem to be a bad topic so....If youu post, please make sure that your information came directly from the dev's bagel eating mouths, thanks.
What we know about Oblivion:
1) It will be shipped at the end of this year. No precise date yet.
2) It will be live aware for Xbox 360 users.
3) It will have HD for both versions. (PC and Xbox 360)
4) It will not be multiplayer.
5) It will feature acutal trap and not just spell-traps.
6) It contains over 400 books.
7) The land-mass is larger than Morrowind's.
8) It will have over 200 dugeons.
9) You can puchase houses.
Did I leaving anything out?
Edit this, don't re-post every time. Thanks. edited by Epy
-It will have more than 200 dungeons
-The main quest will be approximately 30 hours
-Houses will be purchasable
-(conjecture) It will take place 26 years after Morrowind
For the basis on that last one, check out the Third Era Timeline. Uriel took the throne in 3E388. Add 65 years to that and it's 3E453 when the Emperor gives that speech in the trailer. 453-427=26.