If you're curious about Coda 2, you can watch Blaine and I as we do a review of Coda 2 as it compares to Sublime Text 2.
It's also a test of using Google+ Hangouts that allows you to record your conversation and broadcast/save it out to YouTube.
Relevant links for making your purchase and supporting this blog: Coda 2 (Coda 2 - Panic, Inc. on for $49.99 half price today, regularly $99) and Diet Coda (App Store for $9.99 for now).