Great to see all the interest and character concepts. Like most of you when I play gestalt I find the fun/challenge to be that there are so many options it's hard to pin down just one (well actually two). That said, I like the creative ideas that have been put out there so far.
As for the rules I will use to govern the gestalt progressions, I'm still working on them (I'm currently deciding what to do with races with LA), but they will be posted when I open the actual recruiting thread (should be within 24 hours). Right now I'm off to see a presentation by John Bolton though (which should be interesting to say the least), so I don't have time to finish up all the details.
If you want to start getting your characters ready to submit though, I can tell you that I will be looking for...
1) Full class progression (including your projection from our starting level onward to 20th)
2) History/Background
3) Appearance
4) Description of the character's utility as you image them in the game (should include something like "pick me cause I'm really good at X")
Obviously The history part can just be a rough draft since I haven't said where we will be playing, but you can use campaign specific stuff if you want (like locations in the realms). This is mostly going to be used as a writing sample.
Lastly, you can post ideas here, but you may be better off just waiting till I make the actual recruiting thread. If you do post here, be sure to move your idea when I post the new thread (I will be sure to link it).