Apple finally came around and released a two button mouse. It's way too easy to make fun of this based on the fact that it took them 3+ years to get on the two button bandwagon. I haven't heard a single argument that really makes any sense as to why they stuck with the one button version for so long.
Educational pricing is at $58 which is a bit steep for a mouse - but because it's Apple I'm sure it will sell just fine. It's got some sort of built in speaker to account for the fact that there's no actual buttons to press - so when you click there's an audible 'click' sound that it makes.