My 2.4ghz Macbook is even too slow to play back 24mbps files. It can playback 12mbps just fine though. I doubt you will find a Netbook that will do it until they start shipping ones with the Ion chipset, which I believe starts in June. So not too long to wait.

http://www.pocket-lint.com/news/news...med-june.phtml

Here is a pretty impressive demo video:

http://www.tweaktown.com/news/11369/...deo/index.html