It seems that there are ample public transport options for exploring the Isle of Man by public transport. The website iombusandrail.info should tell you much of what you need to know. Recently, I made a short visit to the island with the aim of paving the way for others and turned up a pile of useful information for such endeavours, naturally including public transport planning stuff as well. It may have rained on the day but I am not so easily put off.

James Myles
June 22, 2011 at 20:09
can I use my bus pass on the Isle of Man
John Hennessy
June 23, 2011 at 00:34
To answer that, you need to talk to the issuer of your travel pass because it seems to be in their hands as what they’ll cover. For instance, an English bus pass can be used only for bus services in England.
For what it’s worth, here are some places to look for more information:
England: http://www.direct.gov.uk/en/TravelAndTransport/Publictransport/BusAndCoachTravel/DG_10036264
Wales: http://wales.gov.uk/topics/transport/public/concessionary/fares/?lang=en
Scotland: http://mobile.transportscotland.gov.uk/public-transport/concessionary-travel/about-the-scheme
Northern Ireland: http://www.nidirect.gov.uk/index/travel-and-transport/public-transport/bus-and-coach-travel/free-bus-travel-and-concessions.htm
Hope they get you what you need to know or who to ask for more information.