CRM 4.0 - Where do I get those License Keys again?

We have so many great people on the CRM team around the world that I spend a fair amount of time reading their blogs to keep up with all the little issues, details and factoids that affect CRM partners and customers.  One recent issue that has been making the rounds is surrounding where to get your license keys.  Fortunately, Simon Hutson from the UK has recently published a concise and thorough rundown of where to get keys for just about any scenario.  Thanks, Simon!