It’s not per remote method, it’s per call. Set a callback, make a call. The next call you make using the same proxy instance will use the same callback, unless you set a different callback prior to making the call.

One important point to note in this regard - proxy instances are not thread safe. If you’ve made a call with one callback handler “cb1″ set, and then set another callback handler “cb2″ on the same proxy instance before the call returns, “cb2″ will be invoked to process the callback rather than “cb1″, since that is the state of the proxy at the moment the response returns.

In general, for asynchronous calls, it is advisable to use separate proxy instances. Proxy creation is not a performance overhead - all the initialization is already done at page load.

@Terrence - thanks! And I hope you blog the stuff you’re doing with it.

@Sam - yes, of course, I saw your screencast, just forgot to reference it here. For anyone who’s reading, go check it out, it’s good stuff.

@Ashwin: These are some great entries you are posting on CF8 and AJAX. FWIW I blogged a screencast of cfAjaxProxy for anyone who wants to see it in action click on my name.