You know for a month I was into this idea (cause Erik put up a bounty mostly), and even built a prototype, and as I was testing it on my own dev machine smf board, it look was so annoying. It is so much easier to put your address in your signature and have people just send it to there. I don't see it really having the same effect as reddit, the reddit bot is more of an ad for bitcoins and reddit doesn't have a signature place, then a practical useful tool on a forum of bitcoin people.
Agreed. I doubt it'd be used much here. People very rarely tip signature addresses. It might be nice to have, but it's a very low priority.
I'd be fine with a bot, though it shouldn't post in topics, and I'm not going to allow posts consisting entirely of bot commands.