The festival is split into two events this year. The prequel in July, and the festival itself in September:

The prequel:

July 17th, 2008 - Accessible from 19:30
@ M/S Stubnitz, docked at Christians Brygge 7, Copenhagen
Just near Langebro!

Sutbnitz is probably our most favourite ship in the world!
This is where it all started out in 2006. An old East German cargo ship, now turned into a moving venue, the M/S Stubnitz is finally able to return to our shores, and we are ecstatic about being able to use it again.
Docked close to Langebro, the location is central and easy to find, and the venue alone is good reason to check out our prequel party!

Stubnitz official website

The festival:

September 5th, 2008 - Doors at 20:00
@ Forbrændingen, Vognporten 11, Albertslund

Forbrændingen is a well known venue for anyone who's been going to industrial concerts in Denmark. It has already played hosts to bands such as Suicide Commando, Combichrist, Feindflug, VNV Nation, Diary of Dreams, and Clan of Xymox, just to mention a few. A large stage and great sound, as well as comfy chairs and areas to sit back and relax, makes out a perfect setting for our killer lineup on the main festival in September.
The location is right next to Albertslund station, located 20 minutes from Copenhagen's central station, and since Das Boot is being held on a friday, the trains will have started moving again before the festival is even over!

Forbrændingen official website

Tickets

For the prequel, there will be no presale, and you can buy your entrance at the door.
Tickets for the main festival are available at BilletLugen, and can be purchased online, or in Fona stores anywhere in Denmark.
Link: Das Boot 2008 tickets