I have only been commuting a few weeks now and today was my first really wet ride. The rain was warm so no real problems. This was the first time I commuted in with the newly mounted milk crate on my 7500 FX. My Trek Grocery Bag pannier broke and I have had no way to transport my laptop bag so I have been leaving it home. I stuffed my laptop bag (with my 17" Macbook Pro) into the crate. The setup worked fine, it just looks kind of ghetto in my opinion. Thankfully I remembered to bring a garbage bag to stuff the laptop bag into once the rain really started to come down.

I am saving for a Arkel Commuter bag, they are just so expensive...