FCP upgrades have traditionally come out around NAB-time, so I doubt you'll be surprised there. Steve Jobs rarely likes to mention Pro Apps or machines during his Keynotes, prefers to focus on consumer items like the iPhone, AppleTV, iMac, iLife, etc. I wouldn't buy a MacBook Pro anytime soon though, those are due to be updated this summer.
Even IF they suddenly announce DVDSpro 5 with Blu-Ray support, or FCP 7 with iPony, Apple actually has a super-secret exchange policy if you just bought something that gets upgraded like a week later.
JK
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SCQT! Self-contained QuickTime ? pass it on!