Galileo came out the other day, and even though plugins under Eclipse are, IMO, just a little bit easier to deal with than Netbeans, it would still be really awesome if ther
Take a look into this blog entry: How to make your Eclipse plugin list survive an Eclipse upgrade
I also used the Yoxos service to build my "own" Eclipse distribution. I guess it should be easy possible to just upgrade the core elements in such a profile, keeping the plugins. It has included dependency checking, so it's very nice to get a distribution running.