I'm sitting here in a hotel room typing my response on an Asus eee PC that came with its own flavor of linux. No problem using youtube, or anything else. It was turn on the computer and less than 15 seconds later it was up and running. It's super easy so that even my mother (who happens to be a granny) can use it straight out of the box. :)

I'm with ya on all but #5, although I do like Thunderbird on my mac.