Well, i seriously doubt they will go to your house if you give your address...the really risky thing about giving addresses, is that it could be part of your credit card information. So, if the place you're staying at is also your "billing address", try to use a PO box instead or try not to give both your address and your complete name...anyway, it's relatively easy to get that kind of data elsewhere, so i don't know if that those precautions are useful ^^'
That Neu Bauhaus company seems to be real, the only suspicious thing about that Toshi guy is that he gives a hotmail and not an e-mail addy like xxx@neubauhaus.net. I did give him a reply, without giving him specific data, just stating the fact i'm not form North America, so i couldn't help him with the promotion...he seemed nice enough and maybe he is for real, so let's wait for J's answer.