There has been some radio play out of Terre Haute, so I can imagine that there is more out of Indy stations. But it is this weekend.

http://www.indyirishfest.com/

I was able to go last year, and found a spot to park suprisingly easy(knock on wood). The festival last year had several groups in costume dancing Irsh dances. It was fun to watch. There were also several genre of bands from classic Irish, folk and Heavy Metal(ish). I had to buy tickets from a center station and use those tickets to purchase food and beverages. Theye had a small section showing some of the Irish dog breeds, and some vendors of Irish History. It was a good showing, and I anticipate the same for this year.