Ray Camden just posted something on his blog that looks very promising: Announcing ColdFire. Ray has teamed up with Adam Podolnick to create an extension for Firebug which adds support for displaying ColdFusion debugging info right inside the Firebug console within Firefox. That means no more ugly debugging info appended to the end of each page! ColdFire isn't available just yet, but hopefully we won't have to wait too long... :)