I'll buy one straight off when the SR mini every comes out. I can really use the X3100 (I play World of Warcraft, which is playable but slightly slow on the GMA950, the X3100 would be much better).
I could also really use the memory with vmware. And my old mini will become my server. Perfect! Well, except the SR mini isn't here yet. I'm starting to get a little worried that they might get cancelled like the rumours are saying.
I don't expect it to be updated until the iMac is though, they seem to go together on those lately.