Some of the fun ones not pictured...
A number of "MY SIGN IS LARGE" type ones. One that read "I guess I really could've been more imaginative with this sign....". There was also a man walking around like he was holding a sign, but NOT holding anything..that got some decent reactions.
There were numerous banana's, people dressed up as Mad Hatters, a juggernaut (Who proclaimed that he was here to restore sanity. Why? Because, He's the Juggernaut, BITCH) to go with Magneto, a gumby collision to elect gumby including his horse, and a number of people in various stages of dressing as a panda bear (WTF, seriously? You go to a Colbert March dressed as a BEAR?! You sir are not American, and you get a wag of the finger).
Also got handed some thing from NARAL, including a "who to vote for" type of pamplet. I gave it back to them and informed them that, much in the spirit of this rally, I actually think for myself rather than mindlessly following who a special interest that is funded for political reasons tells me I should vote for. I also told them I didn't want to litter or cause them to waste money so they can have it back to give someone that wants it.
Best idea of the day that I saw however was someone carrying around a white board so they could continually make new signs.
There were a good bit of other funny ones as well, such as one you can barely see at the bottom left of the last picture, which was a "Hope" poster with "COWBELL" instead and Obama playing a cowbell. I wish I could remember all the funny ones but typically I was laughing and walking after those where as I was playing "Liberal activist at a tea party" for a day and was enjoying snapping pictures of others while proclaiming in a happy loud voice "WOO! This Non-Partisanship rocks!"