As a designer that does this type of thing for a living, I'm just slightly conflicted on this logo. I'll explain. (Consider this VERY CONSTRUCTIVE criticism).
I think it is in many ways actually one of the better logos for a presidential candidate there has been in the last few elections. It's a well-kerned typeface with tasteful serifs that isn't a drastic departure from the Palatino Linotype of the 2008 run. In this sense it has roots in the beginning of the revolution, but it's aesthetically more mature and serious in the way it present's the Ron Paul brand. Most candidates have awful branding. Obama was one of the 1st to actually utilize graphic branding in a much more sophisticated way, which was a double-edged sword in many ways - but his campaign showed the power of dealing with branding in a thoughtful, straightforward way. Others will be investing heavily in such branding I would guess.
The three red white and blue elements crossing the "A" (or crossbar in typography speak) add interest with visual rhythm and color. It's really the heart of the wordmark, and that it was chosen for an inside letter is actually pretty interesting. The letter "A" is one we identify with very early in "A"merica. It is a alphabetical symbol for excellence in academics, commerce, and quality. To a guy like me, who will likely be spending hundreds of hours producing Ron Paul products and marketing material in the next year, this certainly is not lost on me. (And yes, I'm sure anarchists will appreciate it too.)
I also applaud the campaign using a design from a young supporter. I remember seeing the original proposal a while back and loved that this gentleman was like 21 years old or something. That's pretty cool, and really shows what kind of movement this is.
Now for my minor criticisms. The crossbar on the "A" is, I think, a bit derivative of the Obama "O" logo, I'll admit. While that isn't really artistically important, because in this case I think it is employed very well, we have to be somewhat careful with this I think. The Obama administration to conservatives and republicans - the primary voters and activists - is now a symbol of, well, evil to put it honestly. That O obscured by the red and white bands to many is a painful symbol of not only their country's reversal in progress, but their very own reversal of fortune.
I think there are many ways to use this "A" to mitigate the faint similarities between the two logos - Ron Paul is the "A"nti "O"bama - but I just want to point out that to the GOP electorate that still holds onto support for the wars and other statist policies that Dr. Paul heroically speaks out on, they may use this against the campaign.
Overall, however, beautiful job! I like it. I look forward to using it. I applaud the young artist! And... when can I get my hands on it and start putting it on product!!!