Apple's iPhone Developer Connection Site Down-ish?

TiPb is getting reports that Apple's iPhone Developer Connection site is down for update, although it looks like some are logging in fine, and others get the update warning at first, but can log in fine later.
Whether this is just some form of maintenance, or something is actually being changed, is uncertain. We haven't seen iPhone 3.1 Beta 4 yet, even though Beta 3 was released two weeks and a day ago, and the site hasn't been taken offline for previous betas, so the obvious guess may not be so obvious after all...
More if/as this develops. (Pun only partially intended.)
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Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.