I think Thyrd (http://thyrd.org/ http://thyrd.org/) fits the bill. You might want to look at the screencast for a good intro: http://thyrd.org/thyrd/screencast.

I think Thyrd (http://thyrd.org/ http://thyrd.org/) fits the bill. You might want to look at the screencast for a good intro: http://thyrd.org/thyrd/screencast.php?v=01 http://thyrd.org/thyrd/screencast.php?v=01.