Fortunately, by chance this time when I went to Jamendo I noticed the "Browse by Popularity" feature, and suddenly it clicked. Of course! Jamendo is a "web 2.0" site, so it encourages listeners to rate the music and compiles those statistics. A further hint that I was on the right track was that Atomic Cat, which I'd previously identified as great stuff, was up there in the top three. I started downloading what turned out to be 3.52GB of music, and a sampling so far shows that all of it is pretty good quality. At last I feel a bit more comfortable about doing some CC mixing!
Now to go through and work out which have a 'no-derivs' license and try to email them asking if a mix for which they get credit and which will meet all the other terms of their license is OK, so that I can actually publish the thing according to the terms of the license. I don't know what these people were thinking but it was apparently along the lines of "let's make music of a form commonly mixed by DJs and then deny any DJ, even one that uses CC licenses, the chance to use our music."
All posts licensed under the CC-BY-NC license. Author Paul Wayper.