Oops! I meant to direct you to the Irish Times website, which has some good "overview" tourist information, including some on Kilmainham Gaol.

Go to:

www.ireland.com

Scroll down to the "Dublin Live" section, and towards the end are the links to the tourist info.

Also, wanted to urge you to take the time to see the most beautiful sculpture commemorating a "military" event which has no militarism about whatsoever...the Children of Lir sculpture found in front of the Irish Writer's Museum, just north of the City Centre (within easy walking distance--Dublin is a walking city). It is based on an Irish myth, where the children were transformed into swans, and then back again. The sculpture is of the children emerging out of the swans, and is a metaphor for liberation of the Irish from the British. One of the most beautiful public sculptures I've ever seen.

Also forgot to mention that Dublin now has a museum dedicated to Irish traditional music. I haven't been to it, but I've heard it is quite informative and fun.