arod,
Alot of summer college baseball teams are filling their rosters fast. These teams may or may not want a current coaches' recommendation before considering you and offering a spot on their roster. Try checking out the various team's websites and see if they are accepting or looking for players, with questionaires/applications. I also recommend checking the Summer Collegiate Baseball Association's website, as they have several summer leagues you could look at.
If you're presently in college, talk to your coach for a reference and see if he has some contacts for summer teams. He may already want to place you somewhere and you don't want to mess with his planning for you on a team that has already kept a roster spot open that he has negotiated.
Good Luck!