Yes, by all means, we definitely need a good utility to deal with spam!
In this regard, Akismet is very highly regarded, thousands of folks swear by it, and indeed, it comes bundled with WordPress.
And so it shall be!
which leaves the question, tO CAPTCHA or not to CAPTCHA?
Well, I dunno, I have to do some more heuristic research. I suppose I could find half a dozen good CAPTCHA plugins.
Has anybody done any research? Please let me know!