the colors always change... although for the 2.55 bags they always have the black, white, beige and i think pink as well.. and they come in diff hardware... silver, gold or pewter (although i rarely see this). they also come in the pebbley caviar leather or the smooth (but hard to take care of) lambskin and in a few sizes. this season they're doing the classic 2.55 in red as you'll prolly see in the ads with daria. they also have their classic totes like the one mischa barton has on the OC... and then there's the cambon bags, which they are continuing, which come in a variety of shapes and in black/black, black/white logo, white/black logo, beige/black logo, pink/black logo... oh, and they also do the 2.55s in a variety of tweeds that vary from season to season (there was a pink one that was pretty popular that charlotte on satc carried).
i'd suggest you visit a store to get a better idea. when you've held them and seen them in person it's much more accurate than seeing a picture, even an authentic one.
if i recall correctly, you live in the bay area right? i'd suggest you go to neiman marcus in palo alto and they have a decent selection.
i'm actually rather glad (although it's kinda frustrating sometimes) that chanel products (aside from cosmetics, skincare, fragrance) aren't sold online... it makes it more exclusive and slightly less accessible than the point and click LV, dior, etc.