Damn, you are just so impatient aren't you?
Here is the mod that I spoke of: http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=934 by Scwaa
After a quick search, I also came up with http://planetelderscrolls.gamespy.com/View.php?view=Mods.Detail&id=1348 which adds the book 'Cult of Cthulhu' to the game as well as some other occult stories
and also the http://www.elricm.com/nuke/html/modules.php?op=modload&name=Downloads&file=index&req=viewdownloaddetails&lid=1831 by Edward J. Dobrianski which adds many new unique places to a landmass west of Vvardenfell including the 'tomb of Cthulhu'. I haven't tried it myself so I don't know if I can recommend it but I just downloaded it anyway so we'll see.
There are no new models or textures in this one though.
Edit: Red Eye, you snuck in there didn't ya