Try Arc
tryarc.org
tryarc.org
input works, but nothing gets returned...
See also: http://ycombinator.com/arc/tut.txt
Try Arc goes down under heavy traffic because every page load requires its own sandboxed Arc instance to be running on the server. It only takes a few of these to gobble up all the resources on my Linode 512.
In any case, http://tryarc.org is back online. Thanks for your patience. :)