In fact,I prefer to use XP with the official drivers than linux.
Ok,linpus is optimized,but you can't make any updates/upgrades nor install softwares you want (try install rythmbox) because of the acer libs.Even in extended mode.That thing sucks if you do want to use any software other than the one provided.It's just the same if you wanna use extra hardware....Where to get the drivers and how to install them?
Concerning ubuntu,Well it just doesn't work well out of the box...
With xp,you get the drivers/support and you can install whatever software/drivers you want quite easily,even open source one.
Ok lot of people find it smart to spit on xp,but for me,xp is certainly the most versatile/supported OS available(and it's certainly the oldest one too.Damn it's 6 years old and it will be supported 6 years more....No OS will have lived such a long time...Just try to have a 6 years old linux working on the AAO,even a current the current ubuntu has problems)
for me,viva Xp!!