Congress has approved the resolution giving the President to go to war with Iraq. Here's the text of the resolution. Click here to see how your Representative voted and here to see your Senators' votes.
UPDATE: Steven Den Beste notes:

We will now observe one of those marvelous paradoxes which keep appearing in politics. Since Bush won't require UN authorization for war, he'll get it. If the bill which passed Congress had included a requirement for UN authorization, it would not have happened. Isn't political logic grand?
...[It] will be evident to the members of the Security Council that the train is going to leave the station, and they can be on it or under it. With an authorization for war not requiring UN approval in his pocket, Bush will be far less subject to attempts at extortion by the veto powers, and they will recognize that refusing authorization will only harm the UN without any commensurate benefit. UN approval will still be useful, and Bush will be willing to pay a small price to get it, but he doesn't require it and he is in a good position to negotiate.
But if Congress had required Bush to obtain UN approval, then the veto powers in the Security Council would have had him up a tree, and would have attempted to extort huge concessions in exchange for their votes.
...In another of those marvelous political paradoxes, you're now going to see a lot more cooperation internationally. Denunciations will become rare and quiet, and offers of assistance and progressively more vocal support will appear. This is a critical political event for another reason: it will deflate those around the world, especially in Europe, who had still entertained the conceit that we actually cared what they said and that they could still influence the course of events by lecturing us. By its act of ignoring international criticism and obstruction today, Congress will actually encourage more international cooperation and less criticism and obstruction.
Because there is no requirement for a coalition, there's going to be one.