Iterm2 was one of those things I was not expecting to miss so much when I switched to a Linux desktop. There's something about the look and feel of text that I'm used too. Don't get me wrong, there's good terminals for Linux, but I think iterm2 was the best. I'd gladly pay for a Linux port.
Just curious - what features are you missing on Linux that are available on Iterm2? I've used Iterm2 quite a bit and while I think it is more full-featured than my linux terminal, I don't find myself using any features which are not common to both.