Is there a plugin for Eclipse for git-svn? I'm looking for a way to handle the SVN repo with Git (for fast branch switching etc.)
It does not look like there is a Git plugin for Eclipse that supports git-svn yet.
EGit appears to be the most active and popular Git plugin for Eclipse at the moment and it does not support git-svn, but there isn't anything stopping you from using EGit with Eclipse and interacting with git-svn via command line (or via tortoise git for example).
Eclipse bug 315264 is the EGit bug for supporting git-svn, and it looks like something that the maintainers of EGit are willing implement, but they have other priorities atm. So make sure you vote for this bug if you want the feature.