Some interesting quadrangulate reading.

 From:  Michael Gibson
2772.4 In reply to 2772.3 
Hi neo,

> 3D Coat will get an "Mixed-Integer Quadrangulation" which
> will result in much better quad meshes.

Check out here for some previous discussion:
http://moi3d.com/forum/index.php?webtag=MOI&msg=2853.1

- Michael