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!
Well, if you don't want to link directly to it yet, you could have a page dedicated to the broader Rationalsphere which links to everything outside of the main site, such as the Wiki, Slack, IRC, Rationalist Tumblr, ect. That way people would at least know that these things exist.