Note (2014.01.05): Since I'm no longer using drupal this isn't relevant to my site anymore.
Bespin, as it was called, or now Ace is something I always thought was awesome. Code Editing, in the browser? Sweet!
Since I write most of my posts in good old html I figured i should try to load it on here. I found a drupal ace plugin and decied to try it out. The ace editor is nice but the plugin hasnt' been updated in more than a year. So first problem it didn't have softwrap, so long lines are really long. I tried turning it on by just adding the 2 lines of code it should take. But it apparently does some live settings updates and it gets overriden and things start breaking. For now i just turned off automatic line breaks and use good old paragraph tags. We'll see how it goes (may be I'll hack around it some more or try to do something else).
Maybe there's a code mirror plugin that's more up-to-date i can try!