I've been trying to install the SVN team provider off of the Juno update site, but it will hang when contacting the update sites looking for the required software. So, I turned that off and it just hangs at the next step. I have to actually kill the process before I can use eclipse again. I have been using Helios and it doesn't have any issues installing anything.
This is seems to be a network problem of some kind, but I am able to access the internet from all of my other application. I found a topic here that describes the exact same problem, but the solution there did not work for me.