has been available in Google Docs before, but now it’s been revamped a bit. Jury’s still out on the changes, but those of us who are fans of at least appreciate the attempt at implementation. I just played around with it, and it’s still not perfect. There are plenty of things left to be desired. It won’t allow you to use some of your favorite packages, for instance. For more info, see the Google Docs blog post from last week.
[Hat tip: my brother Tim]