I have built and release the GroopBuyr gem at http://github.com/elkinsware/groopbuyr. This is a simple wrapper around the GroopBuy API to get deals through their api.
GroopBuy is a company that aggregates deals from many sites like GroupOn, LivingSocial and others so you can find all the deals for a city in one place. The API is really simple and easy to use.
You can install it by running this command:
gem install groopbuyr
You can see the code at http://github.com/elkinsware/groopbuyr.
Let me know what you think.