Are the reasons for using Twitter different across party lines?

This post is meant to summarize a recent and well-publicized study of ours for those in the Gov 2.0 community who are interested in the key results, but do not have the time to read the paper.

It has been well documented that Republicans have a greater affinity to Twitter; despite the leading Twitter user being President Barack Obama, a Democrat. Our study asks: are the reasons for using Twitter different across party lines?