My last comp use too give out a pen, keyring, fridge magnet with every cutomer care pack.
Bit of an over kill, didnt seem to bring in loads of further work, but the custys love it
Still good to get your company logo out there what ever you do, I think this pays off in the long run, makes people familier with your name which in turn doesnt make you look like some cowboy, gives people confidence in who there investing in
James