Green Glass Co. makes use of used wine bottles and more to create beautiful glassware and gifts.
My favorite is the Beachglass votives, which are unfortunately sold out due to their popularity.  The Cobalt glasses with etched fish are on my wish list too.
If you have a large collection of glass bottles, they may be interested in purchasing them from you.

Check out the site for a full range of products and purchasing details: Green Glass Company