"The ROBLOX Tech Blog is where you will find articles written by our CEO and other top minds on the vision, technology, trends, milestones, statistics and insights of ROBLOX and user-generated gaming."
Examples of stuff posted on this blog are "A Brief History of Physics in Video Games" and "The Evolution of Voxels in Video Games". This is for the users more interested in gaming development and stuff like that.
You can find them at http://techblog.roblox.com/