OK, I made it back to MUC and to my office. In the plane from ARN (which was only 30min late today, lucky me) they where giving away promo coupons for 30min free flynet to all pax using laptops.
The code on the BP jacket given to me in DTW was
P-HOTSPOT30
50% off
CBB is also running a email collecting promo here:
http://coupon.connexionbyboeing.com/
You get a code for giving them your email address!