Back before the days of FriendFeed, it was pretty common to see people post things like, "Just wrote a new blog post. What do you think?" to Twitter. That's a good way of getting your link out there, but if anybody actually wanted to answer your question, they'd probably do it in the comments, not in Twitter. Chirrup is a way of tweeting back at someone and commenting at the same time. A neat trick!

Installing Chirrup is as simple as uploading a bit of PHP or installing it as a Wordpress plugin. Most webhosts support this, and the HowTo on the Chirrup site has straightforward instructions for getting it working. Once it's set up, Chirrup will grab any replies to you that contain a URL from your site, and associate the right comments with the right pages. It also knows how to unpack TinyURLs, which eases character-count concerns considerably.