Well maybe this will at least result in someone resurrecting it, especially considering there is finally a second browser supporting it (using Firefox 11+spdy with gmail right now) and new server support is in development.
His website has some useful posts too, thanks for mentioning him:
The build instructions look insane:
http://src.chromium.org/svn/trunk/src/net/tools/spdyshark/RE...
http://www.wireshark.org/docs/wsdg_html_chunked/ChSetupWin32...
added: okay I decided to stop being lazy and try compiling it myself on win32