If you missed the Unconference at Magento Imagine, I've posted my slides, as well as recorded a full screencast of the demo portion of my presentation on the Widgets feature. It's a two parter, available on YouTube, or embedded below.
During last week's Imagine conference, Magento released (among other things) the 188.8.131.52 version of their Community Edition offering. About a day after its release a bug that compromised a security layer was found. Twelve hours later Magento released 1.5.0