The Eclipse update site is at http://erlide.org/update or http://erlide.sourceforge.net/update
For those that have been using out unstable releases, there are only few new things. For the others, a list of some of the new things can be found in the ChangeLog.
IMPORTANT: Please note that this is the last release that targets Eclipse 3.3. The answers (or more exactly, lack of) to our previous questions about which versions we should target tell us that everybody is running 3.4 or newer. If you're still stuck with 3.3 and will need continued support, please contact us.
/Vlad and Jakob