Please let the iPad version be next. Everyone at our company has embraced Trello and there are a lot of iPads floating around. You can view boards on the web fine, but lose the drag-and-drop niceties in the iPad browser.
The iPad version is on its way, but it's a bit off yet. There's a vastly improved iPhone version that's going to come out first, plus...something else...that the team has been working on.