If you manage, work for or just root for a non-profit, I hope you'll take a look at THE 59 SMARTEST ORGS ONLINE.
And yes, you can learn from these tactics even if you're a for-profit organization... we're now seeing great marketing ideas that move in a direction we're not used to.
Here's a preview of the top five (you can vote if you click through). It's not a popularity contest, of course, because everyone is doing really good work. Feel free to vote for any cause that has a technique or approach you'd like to highlight.