Rough Mock-Up Tools

I know there are plenty of good GUIs out there for iPhone, but I am working on one that is completely minimal. Just as a rough way to quickly get an idea out there, like a blue print.

I needed something without all the details that GUIs like the ones from Teehan + Lax offer. With those I always want to change the colors right then, making the wire framing process last longer. With this ... not so much.

I know there are some places that need cleaning up, and yes, I am working on them :)

( like that rounded corner on the iPhone :-/ )