Hi, I just had this insane idea of creating a post to list all VSTs that work flawlessy (more or less) with ArdourVST, according to users experiences.
Personally, I managed to do almost everything I need with the amazing linuxdsp LV2 plugins, but since I’m setting up a professional recording studio, I’d like to fullfill at the least a few of the many requests I could get, for example Antares Autotune is something that a lot of people request. And of course, reliability is the most important “feature”.
I could be the first to start the list, but currently I’m not using ArdourVST 
Anyway, I use XNL Audio Addictive Drums with FST everyday, and it works with no problems at all, never had a crash in 1 year of use. Being Ardour VST support based on FST (isn’t it?), I guess that Addictive Drums would work flawlessy in Ardour as well.
I can say the same things of Spectrasonics Trilogy. All with Ubuntu 9.10, Wine 1.0, FST and Ardour 2.8.5 built from source…
to point out that while it is possible to get VSTs working on linux (and I have hundreds that worked at one time or another - and this is the point…) What works today may not work tomorrow, I even spent a long time developing a VST host application but have temporarily abandoned it due to problems with WINE regressions. WINE is an amazing project, but it seems that each new release re-arranges the bugs a little, and you can never be completely certain that a VST that loads will always work - I had a few that went through ‘phases’ of not running, and then would be fine for weeks… But its not something you want a project - or a critical session - to depend on necessarily. I guess the point I’m trying to make is that, incredible though it is that you ‘can’ use plugins built for a completely different OS its very difficult to come up with a definitive list of what works and what doesn’t - for the reasons I’ve given. Maybe you need to assign each VST a ‘probability score’