ardourVST is a waste of everyone's time, to be honest. it emulates windows plugins on linux, and i suppose OS X. you have to compile it yourself, due to some licensing bullshit with steinberg (it's all legal and above board though).
i compiled it once a long time ago, and it was horribly unstable for windows plugins.
as for logic running windows VSTs.. no chance, i'm afraid. your only hope is someone brings these plugins to OS X in au form, or mac vst..
thanks,