Using a netbook for reading ebooks isn't good. I've read a few things on my 9 inch eee using fbreader and a netbook is just too big to be comfortable, especially reading in bed and the battery time is crap. It is a lot easier to get a comfortable position using an iphoned size gadget. My ebook readers over years have been Palm V, Nokia E61, Nokia N95 and now a HTC Magic (fbreader FTW!).
You are probably thinking of Guitar Rising. The demo video looks wicked but it smells like vaporware right now.
But there is a similar game coming out by Disney that will most likely actually be released (summer of 2009). Since it's from Disney I dont think there will be any Slipknot and Slayer songs.