Here's a brand new informational article by Paula Begoun on sunscreens that I thought was interesting:
http://www.cosmeticscop.com/BULLETIN/062509-full.htm?utm_source=Beauty_Bulletin&utm_medium=Email&utm_content=Article1Graphic&utm_campaign=062509_BeautyBulletin&emc=el&m=426992&l=8&v=e528b499e6#one
BTW: Her sunscreens are 30% right now. I use two of them myself. One product she pushes that I really don't care for, though, is her lip balm that contains sunscreen. While it says to use it under lipstick, its whitish tint definitely changes the colors of my lipsticks.