I had emailed them a while back about the renaming of Nimrod to Nim and how the version they had was...old. They just emailed me back saying they updated it to the latest and will continue to keep it up to date!! :)
Fantastic. I actually stopped using online nim compilers because they were very outdated. Also, this website use to compile nim, but not anymore http://www.tutorialspoint.com/codingground.htm