Those who look for relevant people to follow should love the new tool Twiangulate. It allows you to enter two or three people of interest to you, and get a list of people that they all follow. It’s a fairly simply concept but it can produce some interesting results.
For example, just as a test I put in my own company, @energion, and my daughter’s id @2girlsmom to see who followed both. Since my daughter’s follower list is substantially smaller than my company’s, that provided a bit of a limit to the total. The results are here, and you will see a number of people there that I would probably be interested in following personally.
This is a simple concept but I think it could be extremely helpful. You can follow Twiangulate on Twitter as well.