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!
FYI, GreaterWrong does exactly what you ask (i.e., GW caches your actual entered raw text, and retrieves that cached text when you later edit your comment/post—regardless of how that entered text has been transformed for display by Less Wrong).