From their myspace:

"NICK CAVE & THE BAD SEEDS announce the first of a string of summer festival appearances.

The band, featuring Ed Kuepper on guitar, will headline at German festivals Southside (Neuhausen Ob Eck) and Hurricane (Scheesel) in June, and at Oxegen Festival in Ireland on 11th July 2009.
This full schedule of festival dates promises to include some of the best and most exciting festivals that Europe and the British Isles have to offer. More very soon."

Great news