Google Satellite Images
WillyShake posted earlier today about the new feature at Google Maps where you can get satellite pictures of almost anywhere. (You have to select "satellite" in the upper right.) I'm sure this has got black helicopter folks up here all worked up, and the other conspiracy theorists are also having a good time. (I love how the guy who "found" Area 51 thought that the center-post irrigation fields were some huge government conspiracy.)
I checked it out last week, and found that you could find most of the submarine bases as well. It really isn't that much of a security risk, IMHO; the pictures seem to be fairly old (the one of my house is at least a year old). It looks like they got rid of the method I was using to save the URL last week, but if you search for 544 White Road, San Diego, CA, you can get a good shot of SUBASE Point Loma, where if you zoom in and go up and right a little, you can even see a submarine on the north side of Mike Pier. Groton doesn't have close-up images of the base, but I don't know if that's intentional or not (King's Bay lets you get a fairly close-up shot, but there are no boats visible -- just type in "Kings Bay, Ga"). If you look at Electric Boat (75 Eastern Point Road, Groton, CT) it looks like there's a boat in the uncovered drydock. For Norfolk (9079 Hampton Blvd, Norfolk, VA) it looks like there are four boats in... but also two carriers, which are cool to look at.
Bell-ringer 0026 18 April: From the comments, here's another site that has satellite pictures.