There is a new release of microsoft ajax minifier on codeplex.com
What Ajax minifier does?
What does it support?
The Microsoft Ajax Minifier supports two levels of minification: normal crunching and hypercrunching. Normal crunching refers to the process of removing unnecessary whitespace, comments, semicolons, and curly braces. Hypercrunching refers to the process of shortening the names of local variables and removing unreachable code.
You can review the project at