I'd like to point out that there are no grounds for impeachment. Plain and simple. We are not in a war. We have not had a formally declared war since world war II, which means that this is technically a police action. For those who may not know the ramifications of that, it means that unlike in war time where the president has unrestricted access to capital resources, as it stands now he must request congressional approval to allocate capital resources. he's not doing anything wrong... legally speaking.
Additionally, with a little reading between the lines here, you'll see that since he needs congresssional approval for more money, if congress REALLY wanted the war to end, they could just deny him funds and he'd have to pull out. But they haven't. This is because the overwhelming majority of congress agrees with the war on some level, even if they don't agree with the reasons why we originally went there.
Most of the political jostling you see over the war is the major players in both parties setting up their respective parties to be in good positions for the 2008 elections. If you look back in history, hot button topics tend to get a little more... touchy... as you near the next election. ESPECIALLY when the sitting president is in his second term and its fair game for both sides.