£50 apparently (289 PLN for 3 days camping?), next to Gdansk and the line-up is:
4th July
The Raconteurs
Fischerspooner
Fujiya and Miyagi
DJ Vadim Live feat. Yarah Bravo
5th July
Interpol
Jay-Z
Erykah Badu
Sex Pistols
CocoRosie
Gentleman and The Far East Band
6th July
Massive Attack
The Chemical Brothers
Goldfrapp
The Cribs
M.I.A
Seems better value than the likes of Roskilde and Rock Werchter which are pretty expensive.

oh yes
well, it's actually £70 according to google convertor but definitely worth it! i went last year and had a great time. i'll probably go again this yeah, just waiting for my friend to confirm that she can go too.
oh, and it's only about 15 minutes walk to the sea! white sandy beach!
and if you want a bigger festival, go to Sziget festival in Budapest. it's on an island on the danube and is on in the 2nd week of August. 7 days and a huge variety of music, for ~£120.
www.sziget.hu/fesival_english
it was £30 last year for 3 days
it was the reason why i went. Good festival indeed