I have searched forums but only found outdated infos.
Does anyone know if there is a 64bit lwjgl 2.0 lib for Vista out there?
Nope. There were some discussions in the lwjgl forum, but AFAIK no 64 bit version is available yet.
You can use the 32 bit version (together with a 32 bit Java). I know that sux, but at least it works.
You could also compile it yourself… All of LWJGL, OpenAL and jME are open source projects. I did this a while ago for 64-bit Linux.