MOBILE PORN
One of the main drivers of 3G mobile phone growth globally is expected to be "adult content" downloads. In most of the world this is quietly brushed under the carpet and everyone pretends it's for video-conferencing and the like, however the porn industry was originally widely credited with ensuring the success of VHS over Betamax many years (it was the format of choice for filiming apparently as the cameras and equipment were cheaper than the Betamax equivalents, even though Betamax was by far and away the better quality format), and has been largely behind the explosive growth in web.
In Belgium however they have recognised this and while they still don't have 3G there, they are using it to promote 2G and MMS functions as this ad (not work safe) none-too-subtly shows. (website found courtesy of Shaky, though he may not want me to mention that)
I can scarcely imagine what their 3G ad will be like