On January 29, Microsoft posted to the Office Live blog a status update re: the migration. The news isn't good.
Beta testers are still potentially "months" away from being migrated to the final version of their Office Live services. Functionality like backup and restore isn't going to work until their accounts are migrated. And Microsoft will give testers only a 24-hour heads-up when they are set to be migrated. During that 24-hour period, users won't be able to make changes to their Office Live sites.
Here's part of the January 29 note to testers:
"Yes, we have started upgrading our Microsoft Office Live Beta customers to the latest version of Microsoft Office Live. "Microsoft Office Live team has been working really hard to upgrade our customers who joined Microsoft Office Live during our beta program to the latest version of Office Live. We understand that many of you are eager to try out the features in the new version. Our goal is to upgrade our Office Live Beta customers to the latest release in the most reliable way.
"Over the next few months, you will receive e-mails at your Microsoft Office Live e-mail account informing you about the time of your account upgrade and the details about the process.
"You can continue to use your existing Microsoft Office Live Beta account fully till the time of the move."
Microsoft, Live, Office Live, Beta, Beta Testers