Plextor announces the new M2S series of SSD drives. These will have a SATA III interface for read speeds up to 480MB/s, a 128MB DDR3 cache and will be in 64GB, 128GB and 256GB sizes.
http://www.engadget.com/2011/02/07/plextor-announces-the-m2s-line-of-sata-iii-packing-480mb-s-ssds/
http://www.engadget.com/2011/02/07/plextor-announces-the-m2s-line-of-sata-iii-packing-480mb-s-ssds/

Besides there's few slc drives because only enterprise will pay the prices. Good write algorithms can nullify mlcs drawbacks, excluding wear, but 25nm drive will last 10+ years and there's no logical reason for getting and slc over an mlc purely on reliability because hd always fail in the end.
wow! might grab the plextor or the crucial M4 with all the new rave reviews its getting with the firmware 0009 update