http://www.meetup.com/Refresh-Chicago/calendar/14224135/ "Responsive design for the web" is the name of the event. I think it's basically about adapting to different browsers/systems/devices that are viewing your site.
"I will be demonstrating several examples of responsive web design using CSS @media queries (and possibly some Javascript for IE."
I don't know if I'll go; it's not really the area that I'm most interested in. But I might.
This one, on Oct 20, I'm almost certainly going to just because I think R is cool.
R is a language that's very useful in statistics. In other words, I suspect that I might run into alephomega there, if he's in town. Hell, maybe I should send the link to him. He's a math whiz kid, finds lambda calculus fun, etc.