github has definitely won the majority mindshare when it comes to open source
git repository hosting. If you need private repositories it can get expensive. Bitbucket is a much better option. It isn’t as social as github, but offers most of the same features for free/cheap.
This free course from the Net Tuts+ premium side shows you everything you’ll need to get up and running quickly with Sublime Text 2. It even includes a chapter on Vintage Mode, Sublime’s modal vi-work-alike.
Writebox is a simple editor for editing and creating text files in your Dropbox† account. No install, it runs in your web browser. (If that’s too easy for you, maybe vi in the Cloud is more your thing? vi in your browser with Dropbox integration.)
† This is an affiliate link. I’m that shameless.