What is the smallest and basic digital still camera available right now? The only feature I need is at least 4 mega pixels, maybe a few auto/manual features such as focus, exposure and interval timer but most importantly around 3.5 to 4 oz. in weight.

It might be either of these, as far as "real" digital cameras go.
http://www.dpreview.com/reviews/specs/Casio/casio_exs600.asp
http://www.dpreview.com/reviews/specs/Canon/canon_sd30.asp

Thanks. I just found this one too.

www.thinkgeek.com/electronics/cameras/7886/

Ah, doesn't fall into my category of "real" camera at .3 mp. If you go to Radio Shack/The SOurce, they usually have a couple similar cameras, but that one is very very cool in the lighter case. Then again, it's no different than a bad cell phone camera so you might be better off with a better cell phone and one less gadget to carry.

I agree about the quality. I would definitely prefer 4 mp or higher but I can't have anything over 4.5 oz.. I looked at their demo images and they were really good. That site didn't list a total weight for that camera.