As an Obama supporter since before he entered the race, I can tell you that with most people I talked to, their biggest obstacle to supporting Barack was whether or not he could actually do it. With his win in Iowa, he has opened the flood gates of all those people.There has been a sleuth of excited stories about Obama since his Iowa win, and I think the comment above from a TPM reader nails the real reason for all the excitement - the Iowa win was huge because it shows the USA has changed enough for a black man to become President.
That is probably in large part a reaction to the never-ending misery inflicted by the Texan redneck, and maybe even the Bubba from Hope before him.
As with Rudd in Australia, there is a palpable desire for change across the USA. I think Obama will go all the way, and I'm not sure that is a bad thing. Sure, he has sucked up to the pro-Israeli lobby and he is being very careful what he says about a whole host of issues including withdrawal from Iraq. But as with Rudd, there is a sense that nobody really knows for sure what an Obama Administration might be like. Hillary Clinton said voting for Obama was like crossing your fingers and rolling the dice - but I think that's exactly what the people of the USA want to do right now. What have they got to lose, right?
I'm also hopeful that Obama might - once in power - get the USA out of Iraq. On the first day after he declared his candidacy, Obama called for US troops to be withdrawn by March this year. That led to some outrageous criticism from John Howard and his goons, which Obama duly bitch-slapped into touch. If that's a sign of things to come, great!
I'm not convinced that any other US Presidential hopefuls (bar Ron Paul, who hasn't got a snowflake's hope in hell or being elected) will really get the USA out of Iraq. Even Edwards. So maybe Obama is the best chance we in the anti-war camp have got.
And even if he doesn't get the USA out of Iraq, his election would be good in so many other ways that it could have a knock-on effect and lead to a substantially more positive US foreign policy in other areas. We live in hope.