I opted for the official Sony bluetooth DVD remote. I keep forgetting that it's bluetooth and I always point it at the PS3, though :-)

When I finally get around to getting a proper home cinema setup, I'll have to deal with the universal remote implications, though.

Oh, and you can shut down the PS3 by holding the 'PS' button until the menu appears. Shutdown System is one of the options on there, then press X to select Yes. You should be able to set up an Off macro easily enough, surely?