News: The Windows Vista version is pushed back by two weeks.
In case you're still holding out for the PC version of Halo 2 and haven't heard about the delay yet, you're going to have to wait another two weeks to play the Vista-only game. Microsoft recently "adjusted" the PC game's release date from today to May 22. The reason given was to make some improvements to the install experience and address other technical issues.
The rest of the release date reminder e-mail indicated the following: "We are committed to providing a fantastic experience for our customers and are excited for people worldwide to soon descend upon Games for Windows LIVE for the first time with this new iteration of one of the most popular video games ever made."
Two more weeks of waiting.