NPR's Talk of the Nation had this as a topic last week:
http://www.npr.org/blogs/talk/2008/08/car_vs_cyclist_1.html

I work at Intel in Chandler and ride to work when I can (both motorcycle and bicycle).  The benefits, for me at least, mentally and physically outway the risks.  I've only had one incident where a pickup loaded with goofballs decided to blare their horn at my as they passed.  This was the section of 48St just north of Guadalupe where's there more than enough room for everyone so I'm sure they were just looking to cause problems.  That said, I've known cyclists (moto and bi) that also look for trouble so it's not just motorists.

I do hope folks and communities figure out a way to share...

ymmv,
C.G.

--
powerofprimes@gmail.com
Carlos Macedo Gomes
_sic itur ad astra_