Century shows us the SDB25SD DIY-able Solid State Disk (SSD). The Century SDB25SD is actually a enclosure for you to insert up to 4 2GB SD memory card. However, the device does not support SDHC which means the maximum capacity it this DIY-able SSD is 8GB. The Century SDB25SD is priced at about 258.5 USD.
Century SDB25SD – DIY SSD
It will be nice if they put RAID-5 logic into controller chip, then it will be 6 GB max, but improved speed (3 times) and guaranteed safety for stored data.