Wow that's pretty cool, sounds like ssd is the way to go. But check this out...
"Samsung is one of the key players in the flash market, and plans to introduce a 128GB solid state drive this year for notebook computers, as does Hitachi."
Thats from an article I read at msn on flash drives making their way into lighter laptops. I think the best thing to do for the average user, who has photos, music, videos, would be to wait until the next revision of the macbook air and get it with a bigger ssd drive. Should be cheaper by then to! Plus gives you more time to save up some money.