Looks like RAM memory based drives are around the corner, expensive for now:
http://www.pccyber.com/?v=Product&i=HD-OCZ-SSD64G
http://www.pccyber.com/?v=Product&i=HD-OCZ-SSD64G
Good point, I remember hearing that they will begin to be shipped in laptops, at least as options in the near future, which would help battery life greatly when performing heavy load disk activities.They also consume way less power
the new macbook air has the option for an SSD