First off, thanks to everyone on these boards for their input -- as a new player the forums have been a tremendous asset and have kept me from driving my forehead repeatedly into my monitor in frustration.
Can someone give me a clue as to the general strategy for open-space (i.e. not on a specific resource) starbase placement. Is it better to have them nearer your planets or further away? Should they be placed somewhere on a direct path between one of your worlds and an AI's world? etc. Thus far I've just been (almost) randomly placing them just to see what happens.