You may have already noticed this, but Tom got the article editor up and running under IE earlier this morning. I'm told that this is just temporary while a more robust cross-platform approach is found.
At the very least, this should be enough functionality over the short-term that some of my more "outspoken" beta-testers will get off my back about the broken article editor for a few days ;)
The move to the new infrastructure seems to have gone very well - good work guys. Note that a few things got borked in the process - new user sign-up, the XML-RPC interface. I have bugged both of these and expect that dev will clean them up tout de suite. On the bright side, the new infratructure absolutely smokes.