[Seaside] Async Callbacks?

[Ramon Leon]

Hi all, having an issue if anyone can help.  I'm rendering a table, some of
the data necessary for the table takes a while to get because of a web
service call, so I'm using scriptalicious to do an Ajax.Updater to live
update just that portion, while rendering what I have immediately.  Problem
is, seaside seems to be making all the callback synchronously, when I need
them to be async.  Anyone know if it's possible to have multiple callbacks
executing asynchronously?