Well the book has continued to be popular and sticking in the charts on the Kindle store on both sides of the atlantic.
If you are a new uke player or know a new ukulele player, would be delighted if you gave it a look
http://www.amazon.com/What-Ukulele-P.../dp/B004JN11WK
And on Smashwords
http://www.smashwords.com/books/view/37988
And, heck - being cheeky - you can get it paperback too!
http://www.amazon.com/What-Ukulele-P.../dp/1461059941