Looks familiar, eh? That's because parts of the CSS are straight-out copied from Wufoo. I would rather support a hard-working YC company than use a "free" tool built on the copyrighted materials of others.
I feel bad that his is ripped off Wufoo, with about the only difference being that the input selection is on the right side.
But, I'm still adding it to my bookmarks. It was only a matter of time before someone made a Wufoo clone for free.
[edit] ... I mean in the sense of it being a form generator... Wufoo still does some pretty awesome stuff with reports and payment gateway integration.
[edit 2] When I said "ripped off Wufoo", I didn't know they literally copied the HTML and CSS. That's obviously very wrong.
