Recently i have been following the Dragon Age development, and in particular the World Builder toolset.

3 words: oh my god!

this is really promising! the things you can do with the toolset alone are infinite!
to create unique looking characters theres a head morphing tool, to create different characteristics to a face as well as facial hair and even tattoos.
this could easily be used for creating character portraits for use in the wiki. (i hear another addiction coming hehe )

my head is already flowing over with lots of other ideas.. like cutscene movies, or even a playable mod.. but i wont go this far yet as i know how it ended when we tried a similar thing with the NWN builder.

heres a link to the builders gallery
http://dragonage.bioware.com/gallery_worldbuilders.html