I remember with pleasure my visit to Riverside, California in 2002.
There is a rather brief description at
http://www.saalfelds.freeserve.co.uk/riverside/cvc.htm
February 2007 marks one hundred years since the founding of the Citrus Experiment Station. There is to be an exhibition at Riverside marking the centenary. I won't be able to get there, but perhaps some members of this forum will take the chance to see the history of one of the greatest citrus research centres. Perhaps they will report back to the rest of us!
UCR Libraries has set up some fascinating web-pages in conjunction with the centenary exhibition. See
http://library.ucr.edu/?view=collections/spcol/ces

Mike aka Citrange