They are folks who help others find jobs or at least share information about jobs.
Sounds like networking?
It certainly does.
Sounds pretty cool too when done via Twitter.
Now Twitter doesn't work inside some corporate environments (Fidelity was one) but on the outside, it is developing to be a pretty cool tool to have handy.
I'll leave this article to explain the remainder of the details that I haven't covered but hopefully have teased you to
If you'd like some tips and tricks on Twitter and it's uses, let me know