The second installment of Jaime Griesemer's HALO Diary is now available at PlanetXBox. Mike Weber, site director of PlanetXBox, sent this note:

In our second installment of the Halo Developer Diary, Bungie level designer Jaime Griesemer delves into the important aspect of developing new skills to play a game, such as Halo well. He describes results from play testing aswell as where Bungie is headed with tutorials for the upcoming Xbox title. Jamie Griesemer tells all...

He certainly does. Read it here.