Okay, so nothing too groundbreaking here, but just to put your minds at rest, Microsoft has reportedly confirmed that Halo 2 will definitely be hitting European stores on Tuesday, November 9, in line with the US release. There had been some concern that the release date, originally announced at E3, would be specific only to the US, with PAL versions likely to follow some time later.
However, Microsoft has since quashed all speculation, stating that Halo 2 would indeed be released across the globe on that very same day. One of the "biggest marketing campaigns ever" has, inevitably, already been mooted. Not that it is really needed, of course.