I'm changing the license on my blog from cc by-sa 2.5 to by-sa 3.0. You are free to share and remix the content of my blog, including code and data examples. In return, please attribute my work. On the Web, simply link to my work's URI. Off the Web (paper docs, slide shows, etc), place my name and the source URI, or an equivalent citation, in the text near my work or the derived work. For example:

Sean Gillies,

Thank you.