I have no idea how hard this would be to create, but I had an idea that it would be very cool and helpful if I were able to select the chords that I can play and am familiar with, and have my search results reflect that. I'm eager to find new songs to play, and don't mind learning songs that I don't know, but having to sift through a bunch of songs that have strange or difficult chords makes the process rather unpleasant. Just a thought.
Keep up the great work!