[Wikimedia-l] xkcd collecting donations for WMF?

[Manuel Schneider]

Did you see this April's Fool Day comic on xkcd, with an interactivly
growing dog: "The dog gains a pound for every $10 donated to the
Wikimedia Foundation via this link."

http://xkcd.org/

Is this real? How can it tell how much has been donated to WMF through
this comic? I see that there is a special campaign reference in the
donation link but how can it fetch the amount?

Has there been any cooperation / negotiation between Randall Munroe and
the WMF beforehand?

/Manuel
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