I was on an LH flight and witnessed someone using a router to get thier co-worker online.
Pax #1 was online, he then pulled out an Apple Airport Express and his co-worker began aquiring the Airport Express and went online. There is AC power in BizClass so plugging it in was not a problem.
I know how they did this because I asked. They didn't want to pay $60 when they could pay $30 to be online.
Of course I am sure the airlines heavily frown on using a wireless basestation in flight, but these two seem to have it down to a scienece for getting two online for the cost of one.