Comments re-enabled

I've re-enabled the comments on this blog, though that came with the painful exercise of weeding out the spam. No matter, some of the ideas and suggestion from the readers out there make it worthwhile. I don't want to miss out on things I might not have learned with the comments off.

To manage the spammers, any comments for posts older than a week get moderated. I'll tweak this figure as I go along.