One speech was on global climate change for the Yale political union that he was President of years ago and the other was on Global Zero and START. (This after spending three days in Sudan helping prevent a war.) Sounds like he got nice attendance at both.
http://www.yaledailynews.com/news/2010/oct/26/kerry-returns/I like the title - "Kerry returns". Simple, but it claims him as one of theirs.
There is also an interesting question and answer, mostly on a future Yale campus in Singapore.
http://www.yaledailynews.com/news/2010/oct/26/q-senator-john-kerry-66/