I recently attended a workshop in Gleanings study centre in Shropshire, Uk, run by Reece Weston. Unfortunately for myself, I turned up with a g/d concertina whereas everyone else had c/g's. Being new to the concertina, I didnt realise that for Irish playing you need a c/g. Never mind, the fingering for the tunes is the same.
Excellent workshop by Reece and I came away having learned three tunes.
Here is a short video of Reece teaching us a tune
http://www.youtube.com/watch?v=H-_h__fo6jw&feature=youtube_gdata_player