From FreedomToTinker — there’s no point in rewriting it, so I’ll just give credit and copy:

Part 1:  The Sloganator

The first evidence of the campaign’s Net-cluelessness was the Bush-Cheney poster generator that came to be called “The Sloganator”. This was a web tool, on the campaign’s site, that let you create a Bush-Cheney campaign poster containing the slogan of your choice. On hearing about this, any Net-savvy person knew exactly what would happen next. Opponents would discover the site and create posters with disparaging slogans. Contests would be held, to see who could make the funniest poster. And the whole episode would be commemorated with an online slide show.

Part 2:  New, Unauthorized Sloganator

I wrote previously about how the remix culture will affect political discourse.
A great example is the new, unauthorized version of the Bush/Cheney “Sloganator”. The original, you may recall, was on the Bush/Cheney website. It allowed you to make a campaign poster with the candidates’ names and (almost) any slogan you liked. After much hilarity at the campaign’s expense, mainly in the form of parody signs with disparaging slogans, the Sloganator was retired.

Now it has been resurrected, appearing in a new, apparently unauthorized, version at http://www.bushsloganator.com. In the remix culture, it’s hard to undo your mistakes, because other people will just copy them.