I recommend http://www.voterguide.ss.ca.gov/prop73/args_rebuttals.shtml as a good starting point. There's loads of jumping-off points to proponent and opponent web sites from there.
Happy reading, folks!
Excellent advice, Prime Choice. I also recommend reading them all, the full text, not just the summaries or pro/con positions.
I also highly recommend reading the following article as a primer. It highlights past deceptions from (including some offered by Republicans like Prop 111 that obliterated the Gann spending limit under the guise of the "Traffic Congestion Relief and Spending Limitation Act.") :
http://www.reason.org/commentaries/balaker_20040229.shtml
Such a Deal
Californians have a history of buying ballot measures that are deceptively written and advertised
February 29, 2004
By Ted Balaker
(snip)
Shady sales jobs and unfulfilled promises are part of today's reality in politics.
Californians must walk into voting booths on March 2 like they would walk onto a used car lot. Expect deception, don't listen to fast talk and watch your wallet