My assumption was that 64 bit operating systems are so widely spread now that 64 bit drivers would for be on the stick. Well, since I did not have any other means of getting drivers I had to connect using my mobile phone. God knows what bill will I get next month (update: 350 kn). 🙂 And 3G coverage is very poor at my location, so mostly I surf using Edge.
Anyhow, you can download 64 bit drivers for T-Mobile Web n Walk Stick here (ZIP file 4 MB). Install drivers first and then plug in your USB stick. Happy surfing.
UPDATE: I can confirm that this driver works with Windows 7 64 bit version also.