You want scalable? You need a Database Professional
I usually try not to have blog posts that just link to other blog posts, however this one was so great I just had to. 
Andy Leonard posted this almost two years ago, but he just tweeted about it today. I'm actually having this discussion right now with some people on the development side of things. Definitely worth a look – http://vsteamsystemcentral.com/cs/blogs/applied_team_system/archive/2006/07/30/114.aspx. Thanks Andy.