first:thanks for the link: loved it, print it!

then: why the final one is working more than the other? well, let’s say, in my opinion, it works by its own.
the other were or a bit too much “arty” or marketed. first ones made me even think of olympic logos.
others, you don’t even “feel” something.
final one: smooth and calm. (i have to admit it’s now i’ve read the post that i noted the O in it)

it’s the sun rising over the country with the last one: hope, trust and reassurance. he had the luck to have a team with good taste that even chose a fantastic typo (for more follow this link: http://www.blog.newsweek.com/blogs/stumper/archive/2008/02/27/how-obama-s-branding-is-working-on-you.aspx) McCain chose a conservative typo.. that was perfect for its campaign!

last thing: its shape made it so easy to adapt in different ways: like badges, stickers: real and virtual.

good comm’! but let’s say it: good product to sell. it’s more easy to sell a ferrari than a traban ;)