Will this speech have any impact at all on the votes cast in 2004? Or is Al Gore now little more than a political has-been?Wertz, you beat me to the punch, I read this yesterday and was considering posting it myself

When I read this speech the other day, it really moved me as well. Gore was able to perfectly sum up the serious problems with this administration in this speech. It makes me wonder where we'd be right now as a country had he won the presidency in 2000 -- I'd say that based on this speech we'd be in a much better situation.
Although there are
many things I think the Bush administration has done wrong in the past 4 years, Gore primarily focuses on Iraq and foreign policy in this speech. I think that was the appropriate move, we have definitely gone the furthest off the track in this area.
In answer to the question for debate, I don't know if Gore's speech per se will have any effect on the election. However, it is clear that Americans are not pleased with how the Bush administration has handled themselves since around 2003 or so. Iraq is probably the one issue that will cost Bush the election and this speech really just brings that into focus in an eloquent and emotionally powerful way.
To back that up with hard numbers, please take a look at this poll entitled:
California's View of the President and the War.
There is an article which accompanies this as well, but I think the graphs summarize the points very well.
California is definitely not the bastion of republican support these days. Outside of Orange County and some parts of Central CA, not many people give themselves that label. However, if you take a look at the top graph, I believe it clearly illustrates the Bush presidency.
Before Sept 11th, Bush was on his way to being a very mediocre president. The day after Sept 11th his approval rating shot up to about 75% and remained there throughout the Afghanistan campaign. The country and the world believed he was doing the right thing. Then it started steadily declining as we got more and more involved with Iraq.
Some of the other graphs on here are also interesting as well. Another key thing to take away is that the reason for this decline in support isn't due simply to Democrats and Liberals. Moderates, independants, nonpartisan and even some Republican voters are turning against Bush as well.
So back to California, while CA clearly isn't a republican stronghold it illustrates a national trend pretty well. The
article correlates this to national trends polled by ABC and CBS.
Gore's speech is timely, truthful and from the heart, which is more than I can say for any Bush administration speech since 9/11.