Hello Odriscoll,
I am very interested in Irish verbs and I am always looking for new sources out there also.
If you are a new to the language, and you want a nice cheap book that lays them all out in a decent chart form, then I highly recommend:
Briathra na Gaeilge le Déaglán Ó Murchú B.A. agus Pádraig Ó Murchú B.A.
http://www.litriocht.com/shop/product_info.php?products_id=795 There is a short break down of the various tenses, moods, and conjugations. The book breaks down some model verbs, and then lists many Irish and English verbs in the back and gives the page number to their model verb.
There is one catch that I do not like about this book, in the back with all the verbs, the authors did something different that I am not really crazy about. They don't list the verb in a "typical" form you would find in the dictionary. Instead, they conjugate it in the first person. This is a little annoying to me.
For example, let's say you want to know the verb for "to spend". In the back of the book, where one would expect to find "caith" you find "caithim." For the life of me, I don't know what they were thinking there.
The book covers about 400+ common Irish verbs and about 500 English verbs. Some Irish verbs have many English meanings and vice versa. To my knowledge, there are not many reference books out there for Irish verbs only. Believe me, I wish there was.
If you already know the Irish verb, one of the best sites out there is An Foclóir Beag. Just type the Irish verb in the search, and if it is in the database, it will give you the full breakdown of the verb. The site is in Irish only, but if you are not a complete beginner, it isn't too difficult to use.
http://www.csis.ul.ie/focloir/ There is also an online website now that can give you a little practice with Irish verbs called "Briathra." It is still being developed but it is very nice for beginners.
http://www.teachnet.ie/acrowley/2004/index.html (Message edited by do_chinniúint on October 05, 2009)