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
I would recommend to read: "Install Plug-ins into Eclipse IDE", specifically written for eclipse3.5.
The method I use is to store all my plugin into one share a Dropins folder, and then launch my eclipse with the following line in the eclipse.ini:
-Dorg.eclipse.equinox.p2.reconciler.dropins.directory=//mySharedDropins
As long as this line is present in the eclipse.ini of any future eclipse, all of those new installation will detect and use my shared plugin.
Combine that with a fine-tuned eclipse.ini and you are good to go!