Not heard anything... I guess a new thread would be made by ISI when it happens though, so we won't miss the news.
Similar topic has been started 2 days ago: LINK - there's no point in starting another one. Beta has been out for less than 2 weeks, so I wouldn't expect any news on update in nearest days. Show a little patience in both waiting for news and searching forums before posting.
I think there's a bot which posts "WEN R UPDATS RDY !!11!1" periodically; it would save lots of time.
Mentioned in other threads already, they're shooting for monthly updates, but don't have a strict schedule. So you might expect one every month, but you'll get them when they're ready.