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WiX Blogs

Blogs seem to be one of the main ways WiX is documented. Not great as reference material IMO, but a good way to learn advanced concepts.

Rob Mensching's New Blog
Rob Mensching's Old Blog
Joy of Setup from Bob Arnson
Neil Sleightholm's Blog
About Windows Installer, the .NET Framework, and Visual Studio from Heath Stewart
Derek Cicerone Installing... WiX, Setup, and trying to make it all easy, not just easier
Christopher Painter's DeploymentEngineering.com, Christopher Painter discusses cutting edge ideas related to the Source Control, Build Automation, Setup Authoring and Automated Application Deployment.
Aaron Stebner's Blog, Setup Issues
Aaron Feng's Blog, Deployment
Stuart Preston's Blog
WiX for Dummies from Loren Halvorson
Raymond Chen's Blog
Mostly tech related...
Strange Lights
Soledad Pano, single article, WiX install sequence
Erno de Weerd, single article, Building a Setup with Custom Actions using WiX
WiX Managed Custom Actions, by Jose Almeda
Jaded Optimist, single article, Making an installer for your plugin
Windows Installer Blog - Online Windows Installer Community
Setup Sense and Sensibility from Robert Flaming
Ramon Smits