Hi, I have found your gem and I find it very interesting. Finally a modern Rails3 rating gem! I am going to start using it right now.
I have dig into the code and I found that the average_rating methods are not present in the README.
I also miss a LICENSE file. Are you releasing this into the public domain? GPL? MIT? Other?
Congratulations and thanks!
Hi, I haven't included a license yet, but it's MIT, so you can use it however you want :) Let me know if you encouter any problems or difficulties.