I ordered the Vetra PS/2 multicaster today. While on the phone, I asked about the USB version being able to handle the N52. Apparently, I was actually speaking with an engineer, and he was able to tell me that initial tests with the N52 were decent, but they were unable to finish the battery of diagnostics. They are however planning to support a large range of such USB devices when they are able to do full testing on them.

Good news for us all, I think.