Justin Blanton on using Twitter as your comment system of sorts:

Not only is feedback via Twitter less formal (in my eyes anyway), it’s generally more convenient than email (for both parties), not to mention that tweets are much easier for me to respond to because I’m severely length-constrained and don’t feel guilty for being as concise as possible, or for not exploring every caveat.

I use a dedicated Twitter account and publish on it as I would an RSS feed. I get a lot of feedback on both the @brooksreview account and my personal Twitter account — I think it’s a great medium for short comments. I am sure it saves me a ton of emails as well.