It's being organised by Porterhouse this year, we've been asked to supply beer along with (I believe) Metalman, White Gypsy and Carlow, broadly covering the south east region. License has been granted for it to run until midnight each night, and as Lugh said lots of good music etc.
Edit - bit more info:
Will run from 7pm Thursday and 12-12 Friday, Saturday, Sunday. 16 beers from the breweries mentioned above, including four on cask. Free entry until 7pm, then early bird price of €8 followed by €10 entry. Live music running all evening, headline act on Saturday night is Jerry Fish. Marquee capacity of 1500, further stage/performance area capacity of 900. Also artisan food area, and entry will be through the winning show garden from Bloom. Will also be serving cocktails made from Dingle gin and vodka, and soft drinks.