My favorite are Nunu Chocolates:

The husband-and-wife owners, Andy Laird and Justine Pringle make super delicious organic chocolates. Their best-selling salt caramel choc is pictured. In addition to vending at the weekend flea market, they recently opened their own store, a coffee shop-wine bar hybrid in Boerum Hill which is cozy and cute. You can order or find out more here.

I also think the mini cupcakes from Kumquat Cupcakery would be super delish favors. Owner Keavy Landreth comes up with all kinds of unique flavors like Peanut Butter Banana Honey, Coffee Caramel Bourbon (pictured above), and for the adventurous couple, Maple Bacon. Yes with real bacon, see photo below!

Kumquat's mini cupcakes are $15 for a dozen here.
Wouldn't these tasty gourmet treats be so much fun than a knickknack favor? Would you ever have edible favors at your reception?