So a call of 10 people is enough for me to make an announcement. I'm going to do an Ask Me Anything about my work as a recruiter at a staffing agency. I send people on interviews for both temporary and permanent staffing. I also do job postings, on CareerBuilder, Monster & Craigslist so I'm answering resumes from those three sites.
My area of "expertise" is general office staffing: admin, customer service, call center, accounting etc. The world of IT is a mystery to me (most firms are IT staffing only or have whole departments devoted to that). As is Academia.
I'm also an American staffing only in the US, so that's what I know.