Some examples that are particularly appropriate include:
- Tasti D-lite offers "treatcards" that allow customers to accumlate points that can be redeemed at the store. This is linked to Foursquare and Twitter. Customers who register their card get extra points with every purchase.
- Dunkin Donuts offers occational specials and free items via it's Twitter account
- Church's Chicken launced a Twitter account. Customers who signed up were matched by a $1 donation to a pledge fund. This sounds like a great way to build a Twitter account quickly, and give to a local cause at the same time. I'm sure this could be leveraged to get some good local PR as well.
- Downtown Alliance, New York, NY: http://twitter.com/downtownnyc (who wouldn't want to hear a choir at South St Seaport?)
- Downtown Boulder, Inc, Boulder, CO: http://twitter.com/downtownboulder (nice offer of 1 hour of free parking for those with holiday cheer!)
- Downtown Los Angeles, Los Angeles, CA: http://twitter.com/dtla (I love the tweet for free tacos!)