The reason I bring it up is to just shake out what a different feel the game would have. I'm 25 so I've only experienced baseball in a 26+ team format and I like the addition of two more teams to get rid of an uneven amount of teams in each league. I'm not a big fan of the DH rule and what it does to the game.
Geographically and Economically adding a team would be tough, but I have a feeling Memphis and Omaha (judging by stats on butts in seats in areas farther away from MLB teams) would be prime targets for MLB teams. I thought Indy and Nashville would work, but judging by the numbers it would be tough to sell tickets. Right now my only geographic sticking point is Omaha isn't in the south, which ruins my AL South dynamic.
Also I don't expect expansion in the sport for a long time, probably not until another 15 years at least and I have serious doubts that MLB will return to an eight team playoff format so my idea is bunk anyway. I really do like the CWS stadium in Omaha though and it could be a nice small city for a baseball team.