Here's the picture I saw of the EX (non leather-non nav) dash.
As you can see the controls in the center control panel are completely different from a nav model.
The sound controls and CD slot are all clustered together. So unlike a model with standard nav, it should be easy to remove all of that and put an aftermarket deck in there.
Temple of VTEC Rumors and News - 2008 Accord Photo Gallery
The difference between this photo and an EX-L non Nav would be that the EX-L has dual climate control. And perhaps some other difference. So that's why I'm interested in seeing the picture should anyone run across one.