RandyTab sounds familiar, I may have dabbled with it at some stage. I think I also used Bucket o' Tab at one point, but I don't think it even supported MIDI playback so it seemed pointless to stick with it when I had access to GP.

I forgot that GP can import TablEdit tabs! It can import Power Tabs too, I see. I wish it could export to Power Tab, that'd be handy. GP6 currently doesn't even let you export to GP5/GP4 format, but I think they're planning to implement this feature in future.