If you don't want to wear clipless to commute, how about these:

http://www.amazon.com/Shimano-PD-M32.../dp/B001AT33CW

They aren't as good as full clipless road pedals, but they will at least give you something while still allowing you to have grip on the pedals even in wet conditions. If you can find them, something like the old set of LOOKs I had on my commuter for a while work great even though they are a bit heavy. They are some of the only road pedals I have seen that have a platform on one side and clipless on the other.