In todays dev build the auto complete triggering automatically seems a little buggy. For starters, when you type a tag, say <html>, auto complete (IntelliSense) comes up automatically which is great. However when you select the closing tag it adds a leading caret. So <html> results in <<html>. Also, it seems that it's using the snippet to do the auto complete, instead of just closing out the tag you typed. This may be intended functionality and if it is, it would be nice to see a config option to specify whether you wanted it to auto complete using only the tag or the snippet.
Release Date: 21 December 2011
Experimental: Auto complete now triggers automatically. This is configurable via new file settings.