A few hours ago we brought you news that the popular live video streaming site Ustream may have been hacked ahead of Apple’s WWDC 2012 keynote. Attempts to access the site using Google Chrome and Mozilla Firefox consistently led to messages that the site was dangerous, while Apple’s Safari browser occasionally returned a similar message.

According to a post on Ustream’s blog, the problem stemmed from a third party ad provider. The provider was removed and everything started working normally again.

Fortunately, Ustream’s live coverage of Apple’s WWDC keynote was not significantly harmed. The stream drew an impressive 40,000 viewers who watched Apple introduce the next-generation MacBook Pro, OS X 10.8 Mountain Lion, and iOS 6.

Perhaps the most interesting part, though, is that the Ustream coverage was not sanctioned by Apple. For reasons known only to them, Apple hasn’t done live broadcasts of product announcements for a few years now. What’s more, they forbid attendees of such announcements from doing their own broadcasts via services like Ustream. In fact, the Ustream feed was interrupted fairly early in the presentation because the person running the camera was apparently caught. Fortunately for those who were watching, though, the feed was restored shortly thereafter, and although it was a bit choppy, it remained uninterrupted (except by Ustream’s ads) for the rest of the keynote.

Though Apple usually posts its own video of WWDC keynotes and other presentations, it hasn’t done a live stream of such an event since the 2010 launch of the second-generation Apple TV. I contacted Apple to ask why they don’t stream these events, but have not yet received a response.

If you missed today’s WWDC keynote, you can check out our WWDC 2012 to see all the cool stuff Apple unveiled at this year’s event.