Hammil has shared a whole pile of chords with the site before. Now he's gone back and added notes to his old chords so that you can play them on the ukulele, too. The updated songs are Winter Wrap Up, Becoming Popular, Perfect Stallion, Smile, and the Italian Intro. You can find all those chords in the Season One and Season Two music pages. He also updated his chords for the fan song Are You Proud to be a Brony.
As if that weren't enough, he's also shared some new chords for the Welcome Song, B.B.B.F.F., and Love is in Bloom. These chords can be used for guitar or ukulele. Many thanks, Hammil!