From my own research, this is what I've found:
List of all Zenimax trademarks (Including Skyrim), Official database: http://tess2.uspto.gov/bin/gate.exe?f=tess&state=4010:i8ai62.1.1 (You will need to search for Zenimax, be sure to change the field to Owner Name)
UESP Speculation Page: http://www.uesp.net/wiki/General:The_Future_of_TES_Games
Gameindustry.biz announcement: http://www.gamesindustry.biz/articles/bethesda-pencils-in-new-elder-scrolls-title-for-2010
What all does this tell us? Absolutely nothing new that I can tell, but maybe you all know something I don't, and can read further between these lines
More recent interviews of note:
April 27th, 2009: http://xbox360.ign.com/articles/974/974529p1.html
June 25th, 2009: http://www.gamasutra.com/php-bin/news_index.php?story=24211 (particularly this quoted part)
PH: I don't think so. They're building up their teams, and they already have four amazing brands they're working on. So they already have enough titles to work on that they own. On the flip side, Todd [Howard] and his team have their hands full with The Elder Scrolls and Fallout.
August 14th, 2009: http://news.bigdownload.com/2009/08/14/quakecon-2009-todd-howard-keynote-highlights/
August 17th, 2009: Pete clarify many things of what happen in QuakeCon in this blog: http://bethblog.com/index.php/2009/08/17/clarifying-about-next-elder-scrolls-game-mmo-etc/
Also, the first Elder Scrolls Novel, http://www.amazon.com/Elder-Scrolls-Infernal-City/dp/0345508017, and it's release date, November 24th, 2009.
PLEASE NOTE: AS PER MODERATOR REQUESTS IN THE PREVIOUS THREAD, PLEASE CONFINE THIS DISCUSSION TO SPECULATION TO BETHESDA GAME STUDIOS / TES:V. DISCUSSION OF ZENIMAX ONLINE STUDIOS PROJECTS OR AN ES MMO SHOULD GO IN http://www.gamesas.com/bgsforums/index.php?showtopic=978995
Now start speculating. :toughninja:
http://www.gamesas.com/bgsforums/index.php?showtopic=967722
http://www.gamesas.com/bgsforums/index.php?showtopic=1012840
http://www.gamesas.com/bgsforums/index.php?showtopic=1023117
http://www.gamesas.com/bgsforums/index.php?showtopic=1028904
http://www.gamesas.com/bgsforums/index.php?showtopic=1029912