I realize Iʻm coming late to the party, but I just got here and someone else may be interested. Whodathunk I would be able to answer something?
Here is a really nice piece, Carolanʻs Dream: http://www.youtube.com/watch?v=SiUNvCEkKvY
. The music is in a collection on the performerʻs Web page: http://www.ukulele-arts.com/keltische-musik-mit-der-ukulele/?lang=en
. I bought the collection, 11 in the book, and the tabs are very well done.
Hereʻs another, Neil Gowʻs Lament: http://ukulelesecrets.org/2011/04/19/niel-gows-lament-irish-video-and-tab/
. There is a link for the tablature on the page.
Hereʻs a classical page: http://www.classicalukulele.co.uk/
. Iʻll be getting the Dowland and Sor.
And finally from Ken Middleton in the UK (his Living Water strings are the best Iʻve found): http://www.kenmiddleton.co.uk/Pages/BuyeBooks.aspx
. I have his Celtic book, which is also very well done.