In my opinion, these are some the best ukulele websites on the internet. I recommend you check them out. This is list is still a work in progress, so if you have a ukulele website that should be included here, send me an email and introduce yourself.
Lessons, Chords, Tabs
Dominator Ukulele Tabs
EasyUkuleleSongs.com – Discover a wide variety of ukulele songs to play from Eduardo Uke.