That's my theory, anyway. One of the things I'm interested in tracking are the streaming music services. So tonight I built a Twitter list of people who work at Rdio, Pandora, Mog and Spotify. (Then I remembered Grooveshark!) Give it a click and you can follow it too. I'll show you how I made it below - and of course this process could be applied to any field.

Becky from Fancyhands sent me back great links for lists to Pandora and Spotify right away. The list she sent from Mog wasn't so great but no one appeared to have made a list of Mog employees yet.

Step 2 - I made a list of Mog employees by searching for them on LinkedIn. Then I trained the point-and-click database creation tool Needlebase to go to that search result page URL, click through each person's profile link, check and see if they had a Twitter profile linked there and if so scrape it for me. (My tutorial.) I created a new list of Mog employees myself and added each of those people to it.

Step 3 - I only had a small handful of Mog employees so far and I knew there were more on Twitter, so I searched for mentions of Mog in Twitter bios using Twellow. At that point I had 8 Moggers and was ready to move on with my life. Then I remembered Grooveshark and saw that they had a nice staff list they had created themselves.

Step 4 - I was complaining on Twitter today about how hard it is to splice multiple Twitter lists together and my new pal David McKinney said "try Formulists!"

I did and it was AWESOME. Click click boom, thank you Formulists, here now is a list of exactly 140 people (coincidence!) on staff at the 5 leading streaming music services:

Give that link a click, follow the list, then either visit the link on your Twitter page or add it as a column in Tweetdeck or Seesmic and just like that, you'll have a front row seat for conversations between some of the hippest cats online. Hey, Team Rdio, thanks for the music - I'm so happy I subscribed!

Did you know that there are more than 100 people who work in the Oil and Gas industries who use Twitter? There are more than 400 people on Twitter who say they work in a field related to accounting, 115 professional language translators, 75 people who sew or are tailors and 33 people in the Air Force. How well is your industry represented on Twitter? Wouldn't you like to find those people to connect with them?

How Does It Work?

A service of news organization WebProNews, Twellow grabs publicly available Twitter messages, then looks at the bio fields of the users who published them. Those bios are analyzed for a variety of keywords that are then used to categorize the users by occupation or interest. Twellow says it is actively developing ways to search for users on other social network by occupational category as well.

What's New?

Today Twellow rolled out an easy way to log-in to their service and associate your profile there with your accounts on other services. For example, nonprofit consultant Ian Wilker (see below) has associated his Twitter account with his accounts on places like Delicious, FriendFeed and LInked in via Twellow. That's useful for context, richer communication and forming further connections.

We think this kind of simple keyword parsing for categorization has a lot of potential. Twitter in particular is a great way to communicate quickly with groups of people, but it's particularly valuable if you can add people with common interests to your network. Twellow is an important service that's worth spending a few minutes with and keeping track of for the future.

You can find RWW writers in conversation on Twitter here.