I like Ukecast They are a little haphazard as far as, not getting a new episodes out at regular intervals, but they ususally have good tunes. They play more tin pan alley style, contempory, alternative music and not so much Hawaiian Style (my personal preference) but it is still pretty good. They also have some news about upcoming Uke club meetings and festivals, etc.
Oh, me too.. Sorry, I think Podcast = Audio, but there are some good video podcasts. In addition to Uketoob, there is one by this guy in a fedora that lives on a chicken farm or something, that is pretty good, I forget the name of it ...Ukulele Seconds or something?