[mdip]

They are pretty similar. Because of popular UI frameworks, large sites dedicated to design (and design trends in general), it's pretty normal for me to run into two web sites that look so similar I have to wonder if they're part of the same company.

Is there any other evidence that this was a copy or that the design was intentionally lifted and tweaked/modified from infinium, such as large swaths of JS (not from an open source library) or something ridiculous like a failure to remove your copyright, css elements that are unused on their site but used on yours, id tags in the html and the like that are unique enough to clearly have been copy/paste? Have these guys copied other things belonging to infinium?

I agree with others on the kudos: this was fun way to handle suspected plagiarism.