Users Behind a Firewall Rejoice! Apple Quietly Introduces HTTP Streaming Transport in QuickTime 4.1.

Apple offered the 4.1.1 update to their QuickTime software in early April. Although there were several minor bug fixes, there is no mention, unless you do a bit of digging, of the additional ability to stream using HTTP

Check It Out: Users Behind a Firewall Rejoice! Apple Quietly Introduces HTTP Streaming Transport in QuickTime 4.1.