This is an important topic that is hard to talk about publicly, but it could be great for an in-person off-the-record unconference session.
Setup: hand out slips of paper, anonymously write down what we get paid (optionally listing years of experience, region, or other details), pass around a hat to drop the slips in, shuffle it up, and post the results up on a wall. (With no photos or sharing specific info allowed outside the session.)
This can help prompt great conversations about figuring out whether we’re getting paid fairly (and negotiating for better pay if not).
I was part of a discussion like this at the AdaCamp unconference in Portland last month, and it was very interesting and fun.