Brad Touesnard gives a more detailed peak at Mergebot, a tool that merges local and live databases together. The tool is in beta (with some openings available) and the screencasts Brad includes look impressive. No doubt this will become a valuable tool for WordPress developers when it's released — it's aiming to solve a long-standing developer challenge.
Also from Delicious Brains, Iain Poulson shares how to deploy WordPress Plugins with Travis CI. Their team was already using Travis to automatically run unit tests, but they realized they weren't utilizing the full potential of the tool. Now, they've scripted Travis to run a script to automate the deployment process to WordPress.org when a commit is made to the master branch.