Not necessarily timing related, but I am interested in adding a sound/PA system to my race timing set-up. Does anyone have any suggestions of what to look at for a decent portable, easy to set-up unit that has halfway decent sound quality?

A very nice portable sound system is made by Sieler Products. I have a VoiceAmp190. See http://www.voiceamp.com/

We use the Fender Passport. Buy the extra 12vdc wire too.

http://www.bhphotovideo.com/c/...luxe_PD_250_250.html