Hey, haven't been on the boards in awhile,but i just got a response from the guys at moddb, and they've added a section for Sin Episodes emergence on both moddb and their newer site addondb. So if you have an account you can register a mod/ submit a addon (map, model, sound, gfx etc) for people to download and comment on.
I think doing this will help bring more people to the sin eps community by seeing what people are doing for it. and it will also help your finished work be more widely tried and get a bigger variety of reviews.
anyway for those that don't know the site is www.moddb.com
I think it'd be cool to use it and mabey get some more people to get the game :P