I just bought a banjo uke and am really enjoying playing it. Here are some links that may be helpful.

The banjo uke website which has some very good "tuitions"
http://freespace.virgin.net/dennis.taylor/index.htm

Ukelele World for all around information, strings, and parts
http://www.ukuleleworld.com/

There is also the George Formby Society but it seems to be missing some files
http://www.georgeformby.co.uk/

enjoy:

Now, Does anyone tune their tenor banjo like a baritone uke? I am trying it out for awhile.