So due to my wages not going through until the 25/8/12, i have only just got the chance to buy and begin my adventures.

Can i buy from Amazon (pre-order?), download and play tonight, as it seems i can only buy to wait, and play on 28/8/12?

Anyone from Europe with Answers will be loved. Or anyone from anywhere, with a 'buy now' link and a download link.

See you sooner than the 28/8/12 i hope..

Rek. Uk.

preorders end on the 27th i believe if you pick it up today you should be able to play check official site first

Maybe a little late to say this now, but whatever
If you buy it directly from ArenaNet, you can start playing in the head start right now.  
No idea if it's the same for Amazon, though.