Don't think so – the Microsoft Office girl went on stage at the recent Apple conference stating something like 5 years guaranteed (which is the most any developer will ever give – it's is a long time in IT). Office for Mac is a good money maker for Microsoft, I'd be amazed if they killed it.

Tony. 

PS agree about over-smugness of Mac community re: security exploits. Will be interesting to see how effective / speedy Apple are at plugging the loopholes.