From what I understand VST is poorly supported on Linux.

That is, there is a version of VST available, but Steinberg don't want to licence it for inclusion in any sequencers etc. for Linux. Which is fair enough, given most of them are open source.

All that said, there is some very good / interesting software available (mostly for free... have a poke around on freshmeat if you're interested), and the OS is rock solid compared to Windows.