In defense of asus' Xandros...
Foreword : yes, I'm your typical run of the mill geek (albeit cleverly disguised as a corporate lawyer with tie, aftershave and all), so yes too, 5 minutes after I bought my 701, it was switched in advanced mode, and 20 minutes later, should I need more horsepower, "eeebuntu" was on bootable usb stick, ready to take over the kit. Long story short : I used the stick to play scummvm, and put games out the bas 4Gb. Everything else I needed was stock in xandros, and more often than not, I was switching back to basic mode, because, well, you know, that's the concept of this thing to be an appliance.
Yesterday, I bought a 900A. My wife has inherited the 701, she's happy, thinks it's cute and don't give a sh*t wether it runs windows, linux or the marathon as long as she gets her mails and MSN. She marvels at the desk real estate she's going to get back once her (current) glass CRT will be removed. She spent the evening playing with skype, etc., and marveled that every single wire that cluttered the back of her desk will be gone for good because they're all *inside*, microphone, cam and all !
Me, I certainly won't bother switching on the advanced mode. ctrl+alt+t is enough to make my day on those rare occasions I need to rampage through locked process with top.
One note, though : I've been very disappointed by the Atom, hailed as the miracle solution to everything including hairloss by the crowd. It may run cooler or be less taxing on the battery (but the 900A comes with a 4cells 4400 mAh, versus 6cells 5200 mAh in the 701, evening the field), but I found the computer to be less stable (hitting a key during the boot is a sure way to lock the trackpad solid), and the overall feeling is more "jerky" ; there are unxepected latencies, and then the thing starts to run to catchup, then noticeably slows to cool, and sprints again a moment later... the 701's celeron was much more steady, giving a good sturdy feeling. The pace was slow, but the journey was sure. The Atom, on the other end, seems to have highs and lows like a sprinter on steroids. Only the 9" screen is a clear winner. Otherwise, both models have different pros and cons, but overall are much in the same league. I'm happy I didn't shell out more for a 901, I certainly would have been frustrated. The 900A cost me the same price as the 701 a year earlier.