Sorry for the downtime on some parts of the websites this week. After selling my most server-intensive site I've been downsizing from a dedicated server to shared hosting, and the process has proved more complicated than anticipated. Everything except the demos is back up now, and I'll get to the demos shortly.
In the process I found and fixed a moving-related bug with integrated sites. The uploadpath value in the database doesn't change automatically when the config.php version of that value changes, and this results in integrated scripts failing to find the themes. Run upgrade.php to fix that.
Just as a tip for anyone else moving a website, make sure you don't copy the cache directory -- those thousands of small files take forever and aren't necessary.