this was a topic here in 2005, but for me the issue never has been solved. I have been using Voxengo's WindowsVSTs in a special version of Ardour on Linux for many years, but it caused my many crashes, quite some wrinkles, plenty of gray hair. Consequently, I quit using Voxengo products recently and bought the rather expensive plugin suite from Harrison Consoles.
Hence I quit the crashes, but I can't quit the moaning, I'm just missing my Elephant too much.
So, once more, I ask for native Linux versions of the Voxengo product line. I think, the market is evolving and there are not many competitors. Most of them cannot offer what Voxengo can offer. With Ardour, there is a very good DAW available... and a native version of Reaper might soon be there on Linux.