It's great to see all the vimmers on this thread. One question, WHERE are all you guys? I work at a very large corp. and I am hard pressed to find another vimmer when it comes to discussing the beauty/elegance/purity of vi at the water cooler. May be we need a secret handshake or nod?
From my experience, at Very Large Corp, if there are any vim users, they're likely in ops rather than developers. In smaller companies, you're much more likely to run into vim users. My company of ~10 developers has 6 devs that are significant vim users.
I think the recent DevOps movement (which is actually a label to something that's been around for a while), is strongly correlated with vim (or emacs) users as well. Developers who get their hands dirty on remote systems often want a tool as ubiquitous as vim.