Take a picture of the sunset from a redrock
I didn't do anything. Kate happened to be in the Red Rock Capital of the World; Sedona, AZ so she graciously took the time to raise her pinky as she was standing in front of some red rocks.
I highly doubt that this is going to catch on - I figured that this would be a good experiment for me to see if I can make a pretty sweet website and then just my friends would travel amongst the links of mypinkyup.com, but I'd be tickled if more and more people start to tackle challenges along their way as well.