I just purchased Loving Naturals <a href="http://www.lovingnaturals.com" target="_blank">www.lovingnaturals.com</a> which is 9.99 for a 2oz bottle. Also comes in 4oz size. Still a bit pricey, but we had been using CA Baby which just went up to 22.99 at Whole Foods for a 2.9oz bottle! Loving Naturals is ranked #1 on EWG's sunscreen list (2009) and does not contain nano-particles if this is a concern. I've never tried it, though, so can't say how well it works! It receives good reviews on the EWG site, also.
Just wanted to update--we've tried the <i>Loving Naturals</i> for a few extended park visits and Success! It worked for us! Note that it contains the zinc oxide and California Baby contains the titanium dioxide. I think we're going to switch between the two, based on what I've read on the EWG site.