Here’s a small glimpse of open source politics at work. License differences and philosophical differences seem to have lead this relationship to the shoals. It’s too bad, Subclipse is a great tool (I’ve been using it since it was not-so-great), and the fact that Eclipse supports CVS natively but requires third party plugins for SVN support seems somewhat anachronistic.
Update: Be sure to read Mark Phippard’s comment. He’s the project leader for Subclipse and elaborates, basically saying that moving under the Eclipse project offered limited value for a big hassle, given that a Subversion plugin won’t be making it into the main Eclipse package.