Go to "EasyUkulele.com".This site is free to use and has dozen of videos breaking down songs and it also explains how to play several chords, how to strum and how to do finger-picking. The site also provides a chord chart and tabs.
Register with "Ukulele Underground University". If you'd like to learn in a more formal step-by-step way, this may be a good way for you to learn how to play the ukulele. The site offers a "beginner" and an "intermediate" course. The courses cover everything from strumming patterns, chords, chord patterns, picking patterns and music theory. The courses last for 10 weeks and each cost $150, as of 2011.
Go to "UkuleleSongs.com". This free site offers the chords and lyrics to hundreds of songs in many different genres. It also offers dozens of instructional videos, a chord chart and instructions for how to tune your ukulele. If you would like to learn more it also offers suggestions on books and DVD courses for learning how to play the ukulele.