Ask HN: Have you learned / tried to learn Vim? How did you approach it?

I've been brainstorming some ideas for a tool or service to help people learn and get faster at Vim, and was curious what HNers have done to learn Vim. Of course there's Vimtutor, and Vimcasts, but I'm especially interested in how people have overcome the "practice hump" where Vim initially slows you down due to a lack of muscle memory.