Sounds like we might get the North American dates with the European ones. That happened last time: the first two legs were announced together in late January 2005.
My summary: U2gigs.com - Tour announcement on 9 March
Hot Press article: More U2 tour details emerge
Go nuts.
My summary: U2gigs.com - Tour announcement on 9 March
Hot Press article: More U2 tour details emerge
Go nuts.