It also relies on Quicktime 7 (for h.264), which I am sure will be released concurrently with 10.4.

There is some noise being made at the moment about the fact that Quicktime 6 pro users will have to buy a new licence for Quicktime 7 Pro if they upgrade to Tiger. Second hand from macfixit :

Not much different from upgrading from QT 5 to QT 6

Have fun,
Shay
--
=========================== Shay  Telfer ================================
 Perth, Western Australia   Technomancer  Join Team Sungroper in the
 Opinions for hire              [POQ]     2005 World Solar Challenge
 http://public.xdi.org/=Shay    fnord     <http://sungroper.asn.au/>