The template debugging looks awesome. I wonder if there is a project that provides django template debugging as a stand alone thing? I don't see myself ever moving from vim to Jetbrains.
I should note that the vim support in netbeans and eclipse was just about flawless. It's a shame IntelliJ couldn't steal/adapt one of those projects to work within its IDE set.
I find the small bugs in IdeaVIM well worth the added bonus of using IntelliJ over using vim alone or using netbeans or eclipse. I fiddled with eclim and jbvi and other vim-ish things, but IntelliJ really is the best Java IDE IMHO.