That looks fantastic. - Kevin Fox

Omg I love it! Lately I've been doing more wireframes than actual mockups, and I wanted them to be team-editable as well, so I was using Google Doc's drawing tool. This is way better. Great find! - Jess Lee

It's Hypercard! (edit: no it's not) - Hayes Haugen

Neat. It's a canvas app. - Scott Ludwig

Anyone had experience with Balsamiq? Wondering how mockingbird compares - Adam Kazwell

Nice, but I don't think many clients are going to enjoy being told to 'just upgrade to a PROPER browser!' when they discover they can't view the wireframes in IE - Duncan

"Proper: Of the required type; suitable or appropriate" Could have chosen a less aggressive word, but it sounds like IE isn't a browser of the required type, so the word is technically correct in this context. The question of whether IE *should* be improper is another matter. - Kevin Fox

I don't think it's a case of whether it's a proper browser or not, regardless of the definition; the usefulness of the app would be somewhat stunted if one half of team have problems using it. Or at least, I hope I'm not the only one who's had clients who still use IE6, and, for one reason or another, can't upgrade. Anyway, I'll shut up now, this is beta software, just hope that moving forward, they at least support IE8! - Duncan

There is no sane reason to be developing software for IE6 anymore as it's past for even Microsoft. Yeah, they still make some random updates to it but if some companies are stuck with IE6 (for other reasons than having some software that are binded to that specific version) some might ask if their security policy is working or not. - Daniel Schildt

It's good to develop software that works in most browsers but there is no good reason go get stuck in the past while creating something totally new. Mockingbird is meant as development tool and if some client does not want to have properly working browser, it's their problem. Wireframes are just the beginning part of UI development so there isn't need that have this kind of software working in ancient browsers (as if developers would still mainly develop everything first for IE6...). - Daniel Schildt