I'm doing the cutsey "Don't be blinded by our love, grab some shades!" thing before our ceremony. I ordered these:
The price is definitely right: $6.68 per dozen, and I have free shipping with my Amazon prime! (Side note, I invested in Amazon prime when I started wedding planning and it was a GREAT decision - I've ordered a TON of stuff from there already that it's definitely already paid for itself in the free 2-day shipping). They were just delivered yesterday and I really like them--they're a cool Ray Ban-ish style and I think people will really enjoy them. I wanted to do personalized ones, but these were just such a good deal I couldn't pass them up. Plus, maybe people will use them after the trip if our names aren't on them.