As you can easily see when you visit LessWrong.com, the site transfer is complete, and we are now on the new URL. The data import will run for the next few hours, and by tomorrow morning everything should be complete.
Let us know if you run into any problems, find any broken links, or anything of that sort!
It's my understanding, thought Oliver can of course correct me if I'm wrong, that the canonical domain will be lesswrong.com, and all lesserwrong.com/* links will redirect to lesswrong.com/*, to ensure that any links on the web to lesserwrong.com continue to work.