Developers: App Hub down from now until the end of the day, 'service upgrades' or something more?

It looks like developers get to take the rest of the day off, as Microsoft has temporarily taken down all of App Hub's services. Here's what the service notice reads:

Pardon our dust. App Hub will be down for service upgrades for most of the day starting around 10 a.m. PST on Monday, July 18. During this period, developers will be unable to register, to access their Windows Phone developer accounts, or to use the forums.

We appreciate your patience.

So if you were planning to finally push the button to get that app certification moving, you're probably going to have to wait until tomorrow. However, this notice and the timing of it has some speculating Microsoft is doing more than just "service updates". Popular conspiracy theories include the addition of more supported Marketplace countries, backend work on the web-based Marketplace, or the ability to finally submit Mango-friendly apps to the Marketplace. We'll see how things turn out by tonight or tomorrow morning, but in the meantime keep coding those Mango apps!

Via: WP7 Connect
Source: App Hub