What is a good sandal type of cycling shoe for summer riding?
I bought a pair of Northwave Shark shoes this year which are SPD compatible and used them in the short British summer.  They have open vents on each side so are kind of sandal like.  

Weird thing is that the site www.northwave.com, only shows these in the PDF catalogue and not in the Product listing.

I had been looking for some time to get this style of shoe so grabbed them when I could.