First, Jesse Waites (@JesseWaites), currently attending Metis (by Thoughtbot) in Boston, will show the new Bourbon.io. It's like Bootstrap and Foundation, with a unique flair. Checkout: http://refills.bourbon.io/ for :woah:'s and :clap:'s
Then, Joshua Reiken (@tehhax) will share what went down at RailsConf in Chicago in April. There was a lot of awesome, as well as some DHH TDD debate that's still going on. Let's see where Rails is going, and what's what.
(but really, go checkout http://refills.bourbon.io/. The cards/ and typography are really fantastic.)