In my brief testing with some CoffeeScript files, I had a few autocomplete suggestions that got the last few letters clipped off. Not a big deal, but a little odd.
I gave it a shot one weekend, but went back to my highly-customized TextMate. ST2 is still rough around the edges. It doesn't show source control status in the sidebar. TextMate has the ProjectPlugin plugin which solves a lot of those problems: http://ciaranwal.sh/projectplus. ST2's find-in-project was also kind of annoying, at least compared to AckMate (https://github.com/protocool/AckMate).
I realized I don't want to make the same mistake that I made when I switched to TextMate: Using a closed-source editor. One day, Sublime Text 2 will stop being developed. It's not clear if they'll ever change the license to something that allows community development. ST2 will probably end up like TextMate: consigned to the graveyard of abandoned closed-source text editors.
That's one advantage of Vim and Emacs: They're never going away.
I'm sort of on the fence. I'm still using TextMate at work, but trying ST2 for some personal projects. It's pretty good, but there are a few things I miss, for instance TextMate packages make great use outputting HTML to a webview for things like Markdown previews, SVN/Git blame, etc. Maybe I'm missing something, but there doesn't seem to be anything quite the same in ST2.
I know someone who did, said it never felt as smooth for Rails dev, but he'd spent years in it grinding code out so it's hard to retrain that muscle memory. I didn't like TM much to start with some ST2 was an easier switch.
I can use IntelliJ for anything from Python to Ruby to Java to Go to Haskell.
Sure it takes a little longer to start up than a no-plugin Emacs or Sublime Text, but it also does a lot more and I don't have to fiddle with it to make it work.
The Go and Haskell support is better in ST2 than in IntelliJ. For Python and Ruby, it depends. IntelliJ is unquestionably better for Java, though.
Also, consider that ST2 is in its infancy and how developed its language support already is (see SublimeClang, for example). As ST2 becomes more popular, it might compete with the most developed IDEs.
I think that's unlikely. ST2 is already exceptionally fast and complete as an editor. As an IDE, ST2 requires plugins. These plugins are written in Python (which can use libs written in C) as opposed to vimscript or elisp. Moreover, these plugins aren't required for editing text files (or having SublimeClang isn't going to significantly slow down editing python files).
Vim and Emacs kill that argument. Neither is slow, and both are older than dirt in computer years. Sublime Text may continue the march without becoming super slow as well. I'm sure a Java-focused IDE could be fast and excellent, but that's not their focus.
It has something called Links, where all URLs that you added are sorted by date. You can save a URL quickly with keyboard shortcut (CMD+D).
I also organize the links that I frequently visit by topics in the Lists section.