Twtrfrnd is a simple little app which compares your the friends you and another Twitterer have in common.
Why you ask? Well, primarily to see whether you’re likely to get along with your new follower and if you’re likely to be interested in similar topics of discussion.
I tried it out with Boris here at TNW.
It revealed two lists:
1. Common Friends: Which showed Boris and I had 64 people that we both follow.
2. Indicators: Which showed that I followed 151 people who also followed Boris.
Give it a try here.