Interesting idea (to suggest based on already written content).
Maybe it would be considered less "spammy" if it would be just semi-automated, i.e. more like an "expert system". Also, it it would work for popular forums like PHP BB or others, would greatly extend it's usage (so not just on Twitter).
That's a great idea. I hadn't thought about plugging it into a bulletin board system, but did think about trying to plug it into facebook. A recommendation engine plugin for phpbb, etc could definitely make the forum operator some additional revenue.
