Origins
While the convention may still be stuck in the 1990s, the convention center is not! They have updated their site with a cool new map you can check it out HERE
GenCon
As the granddaddy of all RPG Cons, you’d expect a lot of maps, and you’d be right, sort of.
GenCon has a map of the current layout of the dealers hall (in case you need to do any shopping). You can find that HERE.
The games are spread throughout Downtown Indy, so HERE is a map of all the locations you might need to know about.
Most of the maps are below, but the Marriott has pop-up maps that I can't link to, so HERE'S the page you can find them on.
NOTE!
As we generally are in the JW Marriott (which is not the Mariott that's described above), keep scrolling down to see the JW's maps that I downloaded.
Open Gaming Convention
Should have updated this when OGC moved, but I was remiss. Unfortunately, the Westford Regency doesn't do maps either. Easiest way to describe where we'll be though is east side of the building, second floor.
Rising Phoenix Con
The folks at the Doubletree sent me a pdf of their floorplan. Here it is for your perusing pleasure.