Summerweight, long sleeve jerseys with SPF 50!!! I've just about worn my Boure jersey out and it looks like the newer ones have only SPF 35 (which is still better than nothing).

This is the one I have (although the 2006 version, which was SPF 50): http://www.boure.com/8604Wa.html

Also, I would LOVE LOVE LOVE summerweight full-length SPF 50 tights WITH CHAMOIS. Instead, I end up wearing my CW-X summerweight full-length SPF 50 tights OVER my cycling shorts with chamois -- what a pain.