Many workmates use eclipse, and their main fear is to re-create all them eclipse projects in IDEA.
When will be available an eclipse-project-migration plugin???
Also, one functionallity that idea hasn't is multiproject support in one window... let me explain: they have in one VCS repository 5 projects, and eclipse let them to open 2 or more in the same window, and also create dependencies between projects.
Its very usefull when you are viewing the source of the api or jar files, and when you are improve it.
Rigth now, IDEA only has multimodule but it isn't as powerfull