Hi,

More at http://blogs.msdn.com/robmen/category/4625.aspx and http://sourceforge.net/projects/wix/

It's released under the IBM Common Public License or CPL The CPL is a 'copyleft' license, just like the GPL. The main point of difference is that the CPL has a software-patent protection clause, which the GPL does not.

(However, Eben Moglen has indicated that this may be included in the next version of the GPL, which would make it compatible)

raj