Thanks Brad, that seems to be an interesting option.
Woj, would you care to argument yourself?
Why a memory with no moving parts would be more unreliable than a 7200 RPM HDD?
What about the SSD hard drives then, they are based on the same technology.
Also there are SSD based flash drives, like this one
http://www.lacie.com/company/news/news.htm?id=10607
Which also solves the speed issues.
What about them?