Well, I guess I have arrived as a blogger. Comment spam is becoming a problem. And as flattering as it is to be considered worthy of spamming, I really do not have time to rush into the TYPO3 backend to delete every bogus entry.
Fortunately, I located an extension that squashes spam for me. Akismet for ve_guestbook (mf_akismet) has proved to be very effective for me. It protects Modern Guestbook (ve_guestbook) which is what the TIMTAB blog extension uses for comments.
It is based on the Askimet spam service from Wordpress and requires that you get a WordPress API key (free). It is currently in a beta state and has no manual. But I had no trouble installing and it works great.
Thanks to Michael Feinbier for providing this extension.