I use the Airport Express/Remote App as well. Very stable except when the microwave is running. Interupts the stream every time. Other than that, I love it.

One of my favorite features: When friends come over with an iPod/Pad/Phone, I give them full access to my library to choose whatever they want to listen to. AND, they can push music from their device to my receiver.

Epic 80/600 + M3's + M3 Algonquins + M2 Computer + EP125
I think I'm developing an addiction.