I got this rain cape for my camera. It's basically not much more than an oddly shaped plastic bag that's open on both ends. It has a string on one end so you can tighten it where the lens sticks out, and a little hole for the viewfinder. It's probably the most overpriced product after movie theater popcorn, but just as the popcorn, it seems very valuable when you are in the mood for it :)
I'm probably not the only one who thinks that there is something romantic about heavy rain on a warm night. The old city of Philadelphia works perfectly for me to fit this mood.