Exactly - the only serious alternative (i.e the Tories) was much, much worse. Blair's personal credibility got shot to pieces as a result of his actions over Iraq, and a lot of regular Labour party voters stayed at home as a result. However the Conservatives were working from such a small base seatwise that they would have needed a huge increase in the overall popular vote to get in, and frankly they still don't appeal to enough of the electorate to get that (far too right-wing). End result is a much-reduced Labour majority in parliament (nearly 100 seats less than before), but still enough to work with. Blair's proably all but done as PM, even though Labour got back in - he'll no longer be able to railroad through measures that elements of his own party aren't happy with any more, and he owes Gordon Brown a big debt of gratitiude for keeping a lot of the party faithful onside (and the voters, thanks to his sound economic policies) - I can see him lasting another couple of years (up to his 10th anniversary of coming to power in 2007), then turning the reigns over to Brown and going off to earn a fortune on the lecturing circuit and write his memoirs.
GM