Yes - it seems as though it is now official:
Qatar Airways to join OneWorld Alliance
Much speculation has abounded about whether or not this would actually happen, given the denial of any such rumors by Qatar Airways' CEO in recent weeks. But it seems as though it is official...and even though it will take 12-18 months to be finalized, this has great travel implications.
If you've been saving up your British Airways or American Airlines miles, you will potentially be able to use them on some fantastic routing to the Middle East and Asia (including India, Qatar, and the Maldives!). I'm interested in seeing how the mileage charts work out, since Qatar Airways' business class product is top-notch, and there are direct options to Doha from Houston, JFK, Dulles, and others.
I also wonder what the other airlines in that area (Etihad and Emirates) will do...