Dogtrousers
Kilometre nibbler
Such as these: http://www.evanscycles.com/products/bontrager/ssr-multisport-shoe-ec059686
I've been riding with these since I put away my Northwave winter boots a couple of months ago. I really, really like them.
I use SPD (2 bolt) pedals. You have to actually take a craft knife to the sole of the shoe to fit your cleats, which is a bit scary as there are no instructions. But this also means that they are suitable for toeclip users, and in that case the sole stays intact and 100% waterproof.
They are nice and light. Not featherweight, but light enough. Certainly lighter than my previous summer shoes (some sort of MTB shoe, forget the brand).
They are good and stiff, but also super comfortable to walk in. I've walked significant (a mile or two at a stretch) distances in them and forgotten that I have cycling shoes on, unless a stone gets caught by the cleat in the recess.
I also like the look too.
Recommended.