What would Mark Zuckerberg and Priscilla Chan's love child look like?

One in a while a Web application comes along that's so damn useful, even we'd invest in it. Facebook? Nah. MakeMeBabies, the site that lets you create ruddy-cheeked mashups from any two photos? Its diapers will be filled with nothing but spun gold. Here's what the site came up with from photos of Facebook CEO Mark Zuckerberg and girlfriend Priscilla Chan. After the jump, we give a few other notable couples the same treatment. Please do add your own in the comments with our image-upload feature — best and worst fake babies will win an as-yet-undetermined prize of nominal value!

What would Mark Zuckerberg and Priscilla Chan's love child look like?

What would have happened had Rachel Marsden was left with more than just a few articles of clothing after those steamy days with Wikipedia founder Jimmy "Jimbo" Wales? Nothing good.

What would Mark Zuckerberg and Priscilla Chan's love child look like?

I have to admit, out of all the babies, Marissa Mayer and Zack Bogue's faux-offspring is the least horrifically ugly.

What would Mark Zuckerberg and Priscilla Chan's love child look like?

"IT Girl" Julia Allison is ostensibly dating Iminlikewithyou founder Charles Forman. But with that lack of resemblance, could Allison be covering for another lover?

What would Mark Zuckerberg and Priscilla Chan's love child look like?

Because Forman and Tumblr founder David Karp are very, very close. Looks like Allison is just the beard and Karp is the Forman baby's daddy.