Yeah, I had a look at fleximusc but it's a bit tacky. One of the dozens of almost-good software packages available. In the end I went for mixcraft from acoustica which is much better than fleximusic but costs the same.

http://www.acoustica.com/mixcraft/

...as soon as I get a bit of cash I'll probably go for Adobe Audition, or else try to win it in the Videoforums competition