I don't think so...
Nope, Xbox360 games bought in the US will not work on an EU system.
You can't. Unfortunately, Blizzard considers the US servers and users completely separate from the EU realms and servers, and you cannot transfer characters across, and the software itself doesn't work either. You have to get a new membership and account if you wish to play in both EU and US.
It is currently not possible to use EU clients for US battle.net accounts or vice versa. Nor can you change whether your battle.net account itself is EU or US. You can only create a new one of the appropriate kind.
With a little manual editing to the realmlist.wtf file you can use the NA client to access and play the EU servers. HOWEVER: You will need to create a EU account. NA and EU accounts are not the same. You will also have to pay for the BC and Wrath expansions, as well as the Cata expansion when it hits.
NOPE
No, the US will never join the EU.
No because the wii is region locked. the US wii is NTSC while the EU wii is PAL. so it will not work, but Australian wii games work on the EU wii as they are both PAL.
No, PSN content is restricted by the region the PSN account was created for. If you are logged into an EU account, you can only access the EU content on the PSN. If any titles are exclusive to the US version, you're unable to purchase them from there.
money is being taken from us to fund the eu
No. The 3DS is region locked, EU games will not work on a US 3DS.
You needed to buy the game with the gamecard, only available in AU and the US. But you can get there with programs if you have a flashcard
The only best way to find out, is to check.