There was a video of shazam on n900 with a 'thanks to QT' address but i don't think there is a hope for shazam on maemo soon. BUT there is soundhound i saw it on n97 and its amazing it can recognize any song/track, i played a trance song with both phones n900 (instinctiv) vs. n97 (soundhound) and soundhound got it with less than the famous 20 sec. where instinctiv didn't recognize it. instinctiv is a bit weak and only recognizes the famous songs.
We need a petition to port soundhound to maemo cause i think its open source application.