...I just got a logitech wave keyboard/mouse combo for $40 and I'm really happy with it = using the setpoint 4.8 you can also encrypt the keyboard which was an added plus...
I haven't gotten my SL upgrade kit yet so I hope that doesn't do anything to the set but so far so good with 10.5X...
I also find that using my no name nano receiver mouse is less of a power draw than with my v470 logitech BT mouse and when I'm wireless/coordless, I want the most battery life possible... it just seems the BT drains the batteries faster...