This idea has been merged into another idea. To comment or vote on this idea, please visit FID-I-5 Provide a Fiddler for Mac OS X.
Not much more to say. Fiddler on Windows is absolutely awesome, but nothing comes close on Max OS X.
Please, please, please offer a native Mac OS X version. I'd hiply pay 4100 or more for it. I'd even pay that for an annual subscription.