here in Ireland the smaller ones are
mantua
http://www.mantuaproject.com/
and leechrum / sliabh na 'something' .... festival
run by these lads:
http://alphabetset.net/
usual buzz here is boxcutter, shitmat, chevron, neil landstrumm, then ska and stuff like that with some more hardcore.
big one is 'Electric Picnic'... the likes of carl craig, laurent garnier
www.bodytonicmusic.com
they do a tent there, and is more dance than the rest of the festival...
edit: and a few lads off this forum run Tetris Safari up north too