Hi,
I recently downloaded and tried Cog version 0.07. I was very excited at first, since your web site lists gapless playback as a feature, and I need this.
However, when I tested it, there was quite an audible click between tracks that should be gapless. This is a very new MacBook running 10.5.6.
I would be happy to provide you the mp3 files I was using if you would like to test them. For what it's worth, it was Beethoven's 5th symphony, Vienna Philharmonic, Kleiber conducting.
Otherwise, you have a very nice program -- excellently plain, but fully functional. If gapless playback worked this would be a winner!
Let me know if there was some way I could help (but I'm not a programmer). All the best,
--George R. Welch