QNX. Despite consistent rumblings that upcoming devices like the Bold Touch, and Monaco would be launching with OS 6.1, it seems that RIM has decided to re-brand the update completely as BlackBerry 7, perhaps to increase the value proposition and differentiate new devices being announced along with it. However, the site also speculates that current phones running BB6 may not get any BB7 action right off the bat -- which could make sense, given that new features like NFC are only present in upcoming devices. All this is naturally unconfirmed, but if this is indeed yet another version of the BlackBerry OS, well, that certainly won't help the platform get any more developer love.
Update: It's offficial. CrackBerry is reporting that RIM Co-CEO Jim Balsillie has informed investors of the new nomenclature on its earnings call, adding that "It's such a big update from 6." We can't wait to see for ourselves.