In my opinion, netbooks should be complementary devices to your PC and not full on PCs.
Part of the flaw for them is the form factor. I like the way you can lounge with the iPad, whereas the netbook is basically a small laptop. The other thing is that whilst you can see flash sites, you don't really want to. iPlayer looks and runs awfully in any os on a netbook.
Another annoying thing is netbooks keyboards are a compromise. the keys are too small and also without a backlight, its taking a long time for me to type this out on my mini 9!
I run iPlayer all the time on my Samsung NC10, and output through VGA to my HDTV and its absolutely fine, even using the higher res stream.