I was so set on buying a timbuk 2 commuter messenger bag, but my plans have changed as my car was totaled and i am buying a Gary Fisher MTB to get around for the next 5 months or so.... So now i need to revise my needs of a bag. I looked at the Timbuk2 bags in person, but i wonder if it will handle a downpour ok? The bag needs to be big enough to handle 2 books, and some accessories, such as my iPhone, Mouse, powercords, etc... My columbia backpack does very well in the rain. It is just too small for my needs, especially since i dont have a car anymore.