|PUBLIC SERVICE ANNOUNCEMENT (akkartik's idea)|
If you're new here, don't get suckered by the outdated install instructions on this site. Use the community-maintained instructions at the arc wiki: http://sites.google.com/site/arclanguagewiki. Then come back here to ask us questions!
Most of my work on Arc these days is in the form of Arcueid, which is a C implementation based on Arc 3.1.
Arcueid's development blog: http://arcueid-arc.org
There are also links to Arcueid's github and releases there.
Aside from Arcueid I program Ruby for a living, and most of my Ruby programming is NOT Rails.