CommentMilk (by John Cow) is a plugin for wordpress-powered blogs.  It allows you to add fields like Your Facebook URL, your MySpace URL, your Twitter URL, etc.   And people can ‘score points” as a result of completing those fields.

This is a very good idea as it allows you to set up contests for your commenters and encourage lurkers to participate too.  For example, you can set POINTS for people who comment, and more points for people who subscribe to your blog via email.  You can even let people “score points” when they Twitter about you (Direct Twitter URL).

Commenters’ latest blog post will be added to the end of commenters’ comment.

What makes CommentMilk unique is the ability to give commenters the options of typing in a keyword to replace the latest post link.   Qool!

You can see a live demo of COMMENTMILK, and a real live CONTEST in action here (US$200 to be won)!