At Computex 2006, PQI announced that it will begin to ship a 64GB 2.5-inch SATA flash drive in August. Although transfer rates (up to 32 MB/s) will be somewhat slower than traditional hard drives, the benefits will include significantly lower power consumption and much higher reliability. Pricing remains a major stumbling block as PQI expects to sell this drive for about $2000 USD.
Samsung is also working on flash-based drives.
Source: MacBidouille