MSN Beta appears to update backlinks quicker than other SE's.
 

I'm a newbie to SEO, mind you - but I notice that MSN is showing nearly all of the backliniks I've obtained the past 2 weeks doing link development - while Yahoo and other SE's are only showing a very small percentage.

I don't know what significance this plays (perhaps you won't have to wait around so long to see results), and I don't know if it will stay this way once launched - but it caught my eye :)