Progress bar for web service?

I am aware that showing progress for file transfers is relatively easy
with WCF since it can be done using a stream (see
http://www.codeproject.com/KB/WCF/WCF_FileTransfer_Progress.aspx for a
good example). However, I would like to show progress for a strongly
typed object. Is there an easy way to do that? I realize I could do
this using a stream as well, but I would need to handle the
serialization/deserialization myself in this case.

I would think there should be a way of hooking into events at a lower
level than the object transfer, but I certainly don't have a clue how!

As an example, I'd like to call the following method asynchronously
and then provide status updates:

[WebMethod()]
public myBigObject MyCrazyMethod()

Any help would be appreciated.

Thanks!
Brad.
.

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