Again, all i know is the Aquarium.  I don't know /where/ it is in the city, nor how to get there, not off the top of my head.

The Aquarium is in the Inner Harbor. If you're taking I-95 North, you want to get off at the I-395/ML King Blvd exit. Keep left and the exit turns into Howard Street. (Do not take MLK.) Follow it down two blocks and turn right onto Pratt Street; the convention center will be on your right. The Inner Harbor is two cities blocks down Pratt. There's two big shopping center/touristy things called Harborplace. All the restaurants are inside of that--except for Hard Rock Cafe which is across from the Aquarium.

I'm only suggesting the Inner Harbor because it's super close to the convention center, same side of the street, and the easiest place to get to. Plus comicon goers wouldn't have to move their cars. But I'm the newbie, so...

If you are going to the con, the best place to park is the Days Inn parking garage. It's right across the street from the convention center and usually has the best rates in the area: http://www.daysinn.com/DaysInn/control/Booking/property_info?propertyId=08218

Meeting up around Baltimore Comicon would be great. Saturday or Sunday?