Okay this one is not a GIS Blog, but is sort of related because of what these programming technologies could mean to GIS. Plus Miguel is one of my favorite people.
Miguel De Icaza is the main architect of Mono.NET and he was also heavily involved in the GNOME project. He is a VP at Novell. Starred in the documentary The Code and movie Antitrust. He also won the MIT Technology Review Innovator of the Year award in 1999.
Mono.NET is an opensource .NET initiative that makes .NET compatible Framework accessible on Non-Microsoft systems such as Linux and Mac OSX. It also runs on Windows as well. One of these days I hope to have time to try this out and test some of my ASP.NET applications on it. As it is I do borrow some of the libraries from the project.
Currently the Mono group is working on Moonlight, the opensource answer to Microsoft's Silverlight.
Miguel's favorite topics to blog about are politics, Mono.NET, Microsoft.NET and everything else opensource.