There's a sixth upgrade I want to add to the recent blog post Five Recent Upgrades That Nonprofits Need to Know About – you can now request to change the name of your nonprofit's Facebook Page by visiting:

Edit Page > Update Info > Basic Information > Name > Request Change:

Until recently, you could only change your Page name if your Page had 200 fans or less through a do-it-yourself method in the Admin Panel, but now their is an official process for Pages with 201 fans or more.