could you put some way to streamripper radios, like the streamripper for winamp's plugin.
Im sure this will make a lot of people happy =D
I'm pretty sure that the 1st idea (about testing connection button) is very possible by uploading a test MP3 file and (perhaps) a M3U playlist (so the file doesn't appears as a link in the song info).
About the ripper, that isn't possible since there's no way to record sound from the PSP's sound card. Only way would be by external recording via a microphone, and you don't get a very good sound quality.