I’ve been using Vrapper for about 2 months and it works great. It is simple to install, and makes life much easier.
It doesn’t integrate Vim with Eclipse, it just emulates Vim’s behaviour so you don’t need to have Vim installed.
EDIT:
I have been experiencing errors while refactoring methods in Eclipse (only when Vrapper was installed) so I stopped using it.
Now I’m using ViPlugin (very similar to vrapper). It works great (especially since version 2.0) and I recommend it, but it is not free (but cheap and has a trial version)
Edit
As the new post mentioned, if we always use the rename dialog to rename, it can be a work around for Varpper.
Preferences > Java > and uncheck “Rename in editor without dialog”
http://sourceforge.net/apps/trac/vrapper/ticket/96