Yesterday I decided to install Vim 7 on my iBook (also available for unices and windows of course) and I was surprised about the nice improvements they’ve made.
My favourite new features:
- Tabs, you can now have multiple tabs and quickly switch between them.
- Spell checker
- More advanced code completion. The regular completion is still there (Ctrl+P), but now shows a drop-down of options. And for C, JavaScript, Python, Ruby and XML it offers real code completion (although I haven’t completely figured out how and when it works).
Here are two screenshots (both clickable for larger version):

