Rob Lichter wrote:
I've used the beta on my iMac to chat with iphone. Why would I buy the alpha if I have the beta?
Quick correction.. [Alpha is before beta|http://en.wikipedia.org/wiki/Software
release_lifecycle] and the new release is certainly not an alpha.
To answer your question, the beta still works perfectly fine. This is reminiscent of when iChat AV left beta. it looks like the new features for the recently released version include support for HD conferences, which may only be functional with the newly released FaceTime HD Camera.
So in other words if you snagged it while it was free it does not seem like it would be beneficial to upgrade if you do not have a FaceTime HD Camera (the new version is even already included on the new MacBook Pro which has that camera).
-SM