For those curious as to what their mobile speed is, you can give BandWidth a shot. Developed by microhaxo from XDA, the app hits the usual servers for your upload/download rates. Pros fo the program included the ability to select servers based on location (including international), data size (small or large) and history for future comparison.
The app is free, no ads and is pretty sharp looking. Only issue we had was with our upload over AT&T's 3G--for sometimes it didn't work (but it did fine over WiFi). Anyways, if you think it's your thing, you can grab it here in the Marketplace.