256GB Crucial SSD Out This Month

Source

Personally, I'd only start considering an SSD once an affordable (sub $200) 512GB variant becomes available.

Those are already tested, and it uses the Samsung controller just like OCZ Summit series. It tests under the OCZ Vertex (Indilinx controller) and Intel X25-M.

Writing is something the Samsung isn't too keen on, though it doesn't have the write latency issues the JMicron JMF-602 controller had.

What is exciting is that there are now two third party controllers (Samsung & Indilinx), where before there were only self-built controller chips. Intel makes its own, MTron and MemoRight made their own, but as they weren't used in other brands this leads to fragmentation and lesser return on investment. So the third party controllers could 'break open' the SSD market since now every manufacturer can "assemble" an SSD using a lego-style building bricks with different flash memory, controllers, DRAM cache chips and PCB.

This could end up being favorable to the price, although NAND flash is still in high demand and its price won't fall anytime soon. I heard they have great trouble ramping up production on short notice.