SUPERTALENT JUST PUT out a 512GB SSD, claiming to be the first one commercially available. The capacity differential between the magnetic and flash has shrunk to only a factor of four.

The new MasterDrive RX comes in 128, 256 and 512GB capacities, and hits speeds of 230MB/S read, 160MB/S for the biggest version. The 128 and 256 use SLC flash instead of MLC like the 512, so write speed is upped to 200MB/S. It looks like the 230MB/S number is controller limited.
The drives are 'RAIDed', as is the current fashion, so you get a lot of speed for less money, but pay for it a little in minimum block size, but that is bearable. In any case, they cost about $1,500 for the 512GB version, but we have it on good authority that they will knock $25 off the top if you buy in quantities of 1,000 or more.
Read all about it here. µ
Of course, the big question these days when it comes to long-term performance is whose controller are they using? It's not on their data sheet...
I think i'll pass.
I'll stick to the 50 buck 500 gig
old style drive instead.
cHARLIE nEEDS tHOUSAND ssd, lIKE bOB dYLAN nEEDED tHOUSAND tELEPhones that Will Not ring.(Takes 'Em in Eve) When Charles Gets Cool Box of thou,SSD,(All Same?) send Batch Over. drashek 25$ Saving Pur.se,
that SSDs now have a greater capacity, as the drive in question is a 2.5" drive...