Brand new Samsung 64 gig SSD $150 at Newegg.com.
Have you looked at brands other than Dell?
2.5" SATA, presumably. I don't know how many of the smallest notebooks accommodate that form factor, or have user-upgradable drives (for any reasonable definition thereof).
Have you looked at brands other than Dell?
Nope. The premise of the article is that comparable Windows notebooks cost about the same as or more than the MacBook Air -- I'm not planning to visit every PC manufacturer's Web site to find a much cheaper comparable machine that I don't believe exists.