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!
I will go ahead and confirm that the author has removed his LW posts. I haven't had a chance to talk with them about it in detail yet and so don't want to speculate further.