I have a bunch of Twitter search/monitoring tools I really like. Topsy, Cloud.li, etc. (used to love Backtweets, but alas — they have been gobbled up by Twitter…)
The latest one I’ve been spending a lot of time with is Followerwonk. It’s a very powerful tool for searching Twitter profiles, and my favorite feature is that it has the ability to export found sets as CSV files for import into excel or other databases. Sadly, no API as of yet.
Advanced search lets you search specifically by name, and so far I have yet to find another service that is better at tracking down specific people.
We are doing an event at the Napa Film Festival in November, and as you can see below, I can easily find people who like both film and wine. Great for highly targeted engagement. I will for sure cover it in more detail at our CES seminar.