This has actually been around for awhile, but here it is now:
25 songs in total. Some are incomplete and bound to be edited at some point. I’m also taking a break from working on this at the moment, so don’t expect the full pack to be released anytime soon. 
After much frustration and pain, I’ve found a way to convert a static image and an audio file into a high-quality YouTube video with the help of ffmpeg:
ffmpeg -loop_input -i image.png -i audio.mp3 -y -b 628k -acodec libmp3lame -ab 320k -vcodec libx264 -s hd720 -shortest output.mp4
Now you can upload mp3s to YouTube from any major operating system without worrying about poor transcoding. Just replace image.png and audio.mp3 with the appropriate files. Thanks to Kuukunen of irc.freenode.net/#ffmpeg for helping me work out an issue with uploading.
As of today, I have completed eight of the fifty simfiles I want to make for Tsunamix. Get them here! Expect a beta preview within the next month or two, and a complete pack of 50 songs within the first half of 2010.
All artwork and songs copyright their respective owners; I attributed most of the art, but I think I forgot to do so on at least one of the backgrounds.