What do you get the social-networking mogul who has everything? Click to see Valleywag's gift to the 25-year-old blunderkind CEO of Facebook!

Yes, Valleywag has gotten Zuck an office befitting Facebook's dwindling cool: a '50s-looking former Hewlett-Packard building in a forgotten corner of Palo Alto near the Stanford campus. (Okay, Facebook COO Sheryl Sandberg helped us get it for him. Thanks, Sheryl!)

Facebook closed early today to finish the move. The company reopens Monday in its new, dreary digs. What better way to note Zuckerberg's now permanently lost youth?

(Birthday card by Richard Blakeley)

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