MSN search IS becoming a MAJOR player - so this video interview with the Engineer and Developer/ Quality Control ALGO team is very revealing for SEOs and Webmasters 

One interesting tidbit is that the overhyped "neural network" may be nothing more than the DirectHit Click Popularity re-hash (notice the "no comment")

The below link code in their SERPs relays all the information about that click to MSN - Can you figure out this code - it really is quite Revealing

http://g.msn.com/9SE/1?http://search-engines-web.com/&&DI=293&IG=7e638b0e044946308410b3e9e1a662a2&POS=9&CM=WPU&CE=6&CS=AWP&SR=6 


Here is the related Blog and ONE HOUR interview with their Engineers

http://blogs.msdn.com/msnsearch/archive/2005/10/22/483846.aspx

http://channel9.msdn.com/showpost.aspx?postid=128677