Bit Tech heard new SSD controllers with SATA 6Gbps support from Indilinx and SandForce won't be ready until the fourth quarter of this year, at the earliest.
ADATA claims it will also ship a Micron chipset-based SATA 6Gbps SSD in Q3 of this year, with a sample slated for public demonstration at Computex in June. ADATA commented that AMD's current SB850 southbridges are the preferential partner for these drives and future SATA 6Gbps SSDs as no current 3rd party chipset (which Intel motherboards are reliant on) provides the same sort of throughput performance. This is something our own test results have shown, too.
As for cheaper SSDs, ADATA claims the latest JMicron 612 firmware update for its S596 improves performance above most Indilinx drives, for a competitive or cheaper price, although everything is still ultimately decided by the whim of NAND.