While I agree that, in a lot of cases, there's little benefit in multithreading *now* - the dual+ core revolution will soon turn that idea on it's head. The main reason multithreading doesn't benefit a lot of programs is that you're still only able to execute a single thread at once. Dual (and the coming 4 and 8 way CPUs) change that, and multithreading will become the main way to speed up an app.
Hopefully, compilers will catch up and start to multithread optimize on their own. Until that happens though, I'd suggest getting pretty comfortable with threads.
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