When looking for something else today I ran into a really cool site.  If you need a quick way to churn out N-Tier logic and code this site is awesome.  It will walk you through the process of building domain objects, data access layers and basic business logic.  It even creates the SPROCS for you as well.  I have not done a thorough check of the code it generates yet, however any tool that will help minimize the time to build any of this is great!

Go Here: http://ntier.inspiredeffect.com/start.aspx

Lot's of Props to Inspired Effect who put this site together it is impressive.