http://www.hulu.com/naruto-shippuden
I started watching Naruto on Hulu, and they have Shippuden 1-40 and 89-94 subbed right now. They're adding 8 old episodes every Friday until they catch up, and 1 new episode every Thursday, 1 week behind their airdates in Japan. Good quality and subbed, but without the Ninja Academy parts after the credits.
Actually... looking at your Joost link, it's the same 1-40 and 89-94, and even the same trailers and music video at the bottom. Looks like Viz is subbing the old episodes 8 per week and posting them all over the entire internet as fast as they can.





















