Here's info from the University of CA

http://www.ipm.ucdavis.edu/PMG/r783303011.html

Here is a link that might be useful: tomato psyllids

And here's info from a San Diego newspaper.

http://www.signonsandiego.com/uniontrib/20050626/news_mz1hs26pests.html

Here is a link that might be useful: tomato psyllid info

Thanks Jean, I was kind of hoping that someone here at Gardenweb might have had the same problem and could share their experiences. I've been following the articles every year since that one in the San Diego Herald came out in '05. There's just not a lot of information available on "effective" control.
Thanks for your response and the links.
Janet