I have a couple ukuleles. Bought them for the kids and taught myself to play. I've turned into a big fan of them. The chords are easy and the fret board is similar to the guitar. For example, CAGED works on the guitar, and CAGE works on the uke. Don't try to learn guitar and uke at the same time though!
Put some good strings on it, if you haven't already. Even a cheap laminate uke sounds good with a quality string. We use Aquila on the Kohala and D'Addario on the Epiphone.
Here's one of my favorite websites that got me started on the Uke:
http://ukuleleunderground.com/
If you have an Android smartphone, check out the Smart Chord app. It's a REALLY great resource for stringed instruments.
When you are ready, look for a concert uke. I am saving up for this:
http://www.guitarcenter.com/Cordoba/20TM-CE-Tenor-Cutaway-Electric-Ukulele.gc A friend bought one and let me play it. So far it is the sweetest uke I have tried.