For What It's Worth: I just bought some cd's from www.Betamonkeymusic.com They contain thousands of great sounding drum loops. They are all short 1-2 measure loops in .mp3 and .wav formats with some being longer 20 second bits. I use these with Cool Edit Pro to loop some jams together for practice. A little work but they sound great. Every type of beat, fill, single shots, etc. They are also cheap and available on Ebay as well. Great guy to do business with.