They where just shipped to OEM's this past week, so we should be seeing them for the mainstream soon.
The only thing I found on the drive is the specs, which look good. Also out of the 3 manufacturers that have 500GB drives Hitachi, Fujitsu, and Samsung only the Samsung will fit inside a MB/MBP. Samsungs drive is 9.5mm where the Hitachi and Fujitsu are 12.5mm.
I'll try to look for info as well and post back here.
Cheers