Earlier quoted context omitted.
If I just want a quick script, I'll just use Ruby without Rails. Plain erb. Or Nitro, or Merb. There are several options for using Ruby for Web apps/sites without having to take on the Rails stack. Rails may be a niche tool, but it's not the only Web option for Ruby developers.
Your cup of Kool-aid is still full?!
I'm sipping. :)
When time permits I'll be looking at Scala.