Mooplr was created by Kevin Lloyd, because there was too much awesomeness over at Dopplr to be contained only on the internets. It needs to be out in the real world, as stickers and cards and stuff.
If you're wondering where all the great colours come from to make these stickers, the Dopplr blog contains an excellent article about how they generate them.
Many thanks go to Mirona Iliescu for her wonderful picture of Dopplr/Moo Stickers from the wonderful picture sharing site, Flickr.
To get in contact with Kevin to report bugs or what-not, just email him. He likes to be called kev and his domain is lloydie.co.uk. Please don't spam him though - he has enough cheap watches.