The Inspector's Console should support the Firebug Console API (http://getfirebug.com/console.html).
Once WebCore has an implementation, it will be automatically available in the Inspector.
Reverting bug to its original intent.
Currently (as of r30941), our console support is as follows:
console.error, console.info, console.warn, and console.log exist, but each takes a single string parameter (as opposed to Firebug's format string + objects parameter list).
You can see our window.console object's IDL at http://trac.webkit.org/projects/webkit/browser/trunk/WebCore/page/Console.idl
I'll take this.
I think it would be good to treat this as an umbrella bug and file sub-bugs about specific methods that are unsupported or specific differences between the behavior of our methods and Firebug's.
console.profile() and console.profileEnd()
With the hard work of Keishi Hattori, we now support the entire console API. Closing this now!