It looks very similar to the Basecamp and Campfire designs (ex: http://campfirenow.com/ http://campfirenow.com/). However, both of those designs are fantastic,

It looks very similar to the Basecamp and Campfire designs (ex: http://campfirenow.com/ http://campfirenow.com/). However, both of those designs are fantastic, and I don't see too much of a problem with using them as design inspiration for a non-competitive company.