Hi, Thalmin:
Maybe a poster should have the EN World logo, the link prominently displayed and say something like this:
EN World Chicago GameDay, June 26th, 9:30 a.m. to 9:00 p.m.
A free day of gaming and a chance to both meet fellow gamers and play in different rules systems. (List some of the rules systems.)
You might want to use some good art from this website or WotC's site.
I will put my town on my tag, and I will write up some of what I am working on for a homebrew campaign. (I now have the time to sit down and write out my ideas. I will likely start a few threads here and elsewhere soon on what I have planned.)