Sword Art Online is on Crunchyroll! And on my HTC Desire HD it's got good quality for any anime I watch. Thanks for mentioning it, it reminds me heavily of my WoW days and it has that awe and excitement factor to it that Naruto gave me back when Shippuden didn't have an Anime line yet. It's really good!
It's an adaption from the novel, which is +10 volumes and still going.
They're mostly side stories at the moment, though. I'm assuming that the first season will basically be Volume 1 and there's a high likelihood of there being a second season based off of Volume 3 & 4.