I am a customer of Gravity Forms and also just recommended it to a customer who bought it ... really awesome plugin, I just wanted to say, and every bit worth the cost.
The customer wanted to have a very short form (name, email) display in the sidebar of their theme. I downloaded Yoast's plugin and installed it, very straightforward. I do have two issues with it though and Yoast has closed comments on his site, so I wanted to post here:
1) I'm not exactly sure how I can use CSS to style the individual elements (the submit button is a little too close to the last input field
2) When I'm displaying a page which contains a gravity form, the spacing on the sidebar widget between elements doubles or triples. It looks awful, but only happens when displaying another gravity form
3) I've tried two social bookmarking plugins (sexy bookmarks, and AddToAny) and tried to constrain them to only showing on posts, but they actually show up in my Gravity sidebar
The 2nd two are the most significant issues .. do you have any advice?