[Seaside] Ajax live updates

[Ramon Leon]

 > Or create a custom subclass of WASession and override the method
 > #incomingRequest: with something like:
 >
 > incomingRequest: aRequest
 >     ^ aRequest isXMLHttpRequest
 >         ifTrue: [ self responseForRequest: aRequest ]
 >         ifFalse: [ super incomingRequest: aRequest ]
 >

OK, I've had no luck with this approach, seems to be too many 
assumptions about session having a current request, then updater not 
being able to find its current session.  Messing with the guts of 
Seaside is just beyond me right now, to many things I don't yet grok 
about the continuations and callbacks and how it all fits together.

 >> Now I understand your problem, thanks for the example. The simplest and
 >> safest workaround (without messing with the internals of Seaside) is
 >> probably to do the AJAX request within a different session.

OK, since I've gotten nowhere on the first approach, is there an easy 
way to do this?  I'd like to be able to just do something like this...

renderContentOn: html
   html div id: #price; with: 'searching...'

   html script:
     (html updater id: aName; asyncCallback: [:r |
       (Delay forSeconds: 10) wait. "fake long running process"
       r div id: #price; with: DateAndTime now])

and have asyncCallback somehow get a url that comes back on a new 
session to prevent blocking, and immediately expire that session after 
rendering so it doesn't hand around for 20 minutes.  Anyone? Anyone?