To Raid or not to Raid, that is the question!!!!

I was doing some research on best practices for hardware for a SQL box. Some people say to use Raid, some people say not to. Here's some articles from Microsoft for the SQL version and hardware configuration.

http://technet.microsoft.com/en-us/library/bb432135.aspx

http://msdn2.microsoft.com/en-us/library/ms190764.aspx

I'll try to dig up some articles that don't recommend using Raid.