To be sure connect the drive to some PC, that have BIOS, not EFI like MacBook Pro. If that pc detects the drive with 8MB size, then it should be 8MB bug.
But I suggest you to RMA the drive anyway, two weeks later
I don't have a PC that I can connect it to. I tried using the firmware updater that came out today and it could not find the SSD.
Just thought I'd throw this out there but I also have a 160GB 320 that was bricked this past weekend. I was installing Windows via VMWare Fusion and the beach ball came up and would not go away. I hard shut down the MacBook and after that the drive was never recognized again. I did have a chance to connect it to a PC and it was not recognized at all, not even in the BIOS. I went ahead and setup an RMA and shipped my drive out today. Hope you have better luck than I did.