First of all - great job! :-)

When I search for any song, I only get the chord progressions of an excerpt, not for the whole song. Question: do you have the chord progressions for the whole song stored?

If yes, why don't you show them? It would be great to use in a fake book...

If no, what did you normally chose? Verse, Chorus? Sometimes the musically most interesting things happen in the Bridge... Why didn't you find the full progression - just for time reasons? I think if you have mostly Chorus progressions, it's quite difficult to deduce general statistical information about "all of popular music", wouldn't you agree?