Change of address AFTER interview

[ulrike 0]

I already posted this in another thread, but I thought I should post it here as well, to maybe find someone who can help me.

I just recently had my interview March 6th, and everything went well, Im just patiently waiting for the actual letter with the visa. But I have a problem in my mind that drives me crazy:

In my German passport, which is valid 'til 2013, it shows my current address here in GErmany. BUT Im moving back to my parents in about 2 weeks. I have told the Lady at the interview about this and she said to put my parents address on the envelope for the Visa. But she didnt write my parents address down or anything. When I move back to my parents house, I have to register in that town again, which means the address in my passport will not be correct anymore.

So: Do I need to change my address in my passport, or inform the embassy again about my change of address, even though the Visa is already on its way?? AND can I even change my address in my passport, even though it will already have the visa in it??? Does anybody have experience/infos about that?? Please, help me.

And: another question while Im at it: When I actually leave GErmany (May 31st) I have to "sign out" of my town/GErmany, which means I wont be registered anymore. This seems to be important to be able to work with the German consular in the US, 'cause if I dont "sign out" the consulars wont be able to help me with renewing passports, etc. (I'd have to do it directly with Germany).

My question is, if I "sign out" and am not registered in GErmany anymore, how can I still travel to the US with my passport, isnt it unvalid if Im not registered anymore?? Or is the visa only what gets me into the country?? Sorry if these are silly questions, Im just confused. I hope someone can help me.

Thanks so much!!