fb140 allows you to find your Facebook friends who are on twitter in 3 easy steps from the fb140 site.
- Sign in with your Facebook account using Facebook Connect.
- Sign into your twitter account using oAuth.
- See a list of all your Facebook Friends who are on Twitter and follow those you aren’t following yet with an easy click.
- Follow your Facebook friends on Twitter that you aren’t already following
Another cool way to easily find people to follow is using find2follow, Read more about it’s recursive graph algorithm.