T-Mobile have hotspots all over the place (cafe's, hotels, etc) and at €29 for a month's access (pre-paid, sign up online at any hot spot) you can't beat the price. If you are absolutely certain that no wifi is available where you're going then the previous posters advice of visiting a Vodafone or T-Mobile shop when you land is spot on - both have very good networks in Germany. You can't beat the price of buying local when you arrive! Vodafone USB stick without contract: http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fshop.vodafone.de%2FShop%2Fpicknmix%2Fchoose_callya_tariff.jsp%3FpropositionId%3Dprod233554&sl=de&tl=en T-Mobile: http://translate.google.com/translate?hl=en&sl=de&tl=en&u=http%3A%2F%2Fwww.t-mobile.de%2Fmobiles-internet%2Fmit-dem-notebook%2F0%2C20338%2C23098-_%2C00.html

I wonder how long it will last as the "standard" with Light Peak allegedly only a year away? Source: http://techresearch.intel.com/articles/None/1813.htm

So it looks like the problem with the movie's key was more widespread than just the Sony Center in Berlin. This article (google translation to English) reports the same issue was encountered in Eisenhüttenstadt.

and it was chaos! Staff at the ticket counter were overwhelmed by the hundreds of people queuing for their refunds :/ I wonder if other previews are going as well as this one did?