The Sea Stallion from Glendalough will be sailing and rowing back to Denmark next Summer and they are looking for crew. Se link for more details.
http://www.havhingsten.dk/index.php?id=979&L=1I have met one of the sailors and this is a tough trip. You need to be prepared to live in damp, smelly and cramped conditions amid a sea of human bodies but if you have ever stayed in a club house in Kerry you are probably more than qualified.
The time commitment is fairly hefty but it is the chance of a life time.