A few sources have confirmed that Nvidia won't be introducing any breath taking products at Computex, at least not in the desktop sphere.
It already announced all that had to be announced and some partners might showcase its water cooled Geforce 8800 Ultras, but that is about it. The rest of the line is selling as we speak.
Gainward has a 8600 GTS 512 MB and we already talked about here, but the company wont be officially at the show. Maybe Pallit or some other partner will, you never know.