in reply to LINQ/Ambition for Perl?

Not yet (that I'm aware of). I have been planning on using something LINQ-based as the query langauge for Presto, but I haven't had time to work on it in the past year. Soon, I hope.

My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?