Like hilzoy, I found the GOP budget bubbles adorably cute. I was hoping to see more underpants gnomes though. That's honestly the only real critique I have of this fine product -- the underpants gnomishness is left implicit. (If any graphically-inclined readers want to take a stab at "gnoming" the bubbles, I'd be happy to post your handiwork).
On a more substantive note, I do think it's fairly revealing that the only specific policy proposal in the entire budget with numbers is a massive tax cut for the rich. The "plan" proposes establishing two marginal tax rates -- 25% for those who make more than $100,000; 10% for everyone else. As I'm sure you know, that's a huge benefit for those who are doing pretty well. Clearly, this is not a party whose sole mission in life is to redistribute income up the ladder.
It's also worth noting that, hilarity aside, it's full of misleading and downright false assertions. A few of the biggies that I saw was the continuing attempt to pin the market meltdown on the Community Reinvestment Act (of 1977), and Fannie and Freddie. This article provides probably the best summary I found on why these are simply demonstrably false claims. (More - here, here, and here).
And there are other goodies too -- like this one (p.5):
Hamas and NPR -- both are recipients of Obama's largesse.