Adioso (http://www.adioso.com http://www.adioso.com) seems quite good in that regard. I've had contact with one of the developers from submitting a bug report a

Adioso (http://www.adioso.com http://www.adioso.com) seems quite good in that regard. I've had contact with one of the developers from submitting a bug report and they're very friendly and seem on the ball.