DiskWarrior is great, but there are two things that are missing:

a) the ability to create a new boot CD based on a boot-CD maker and an Apple Software Install CD. All the "updater" needs to do is not update an existing DiskWarrior CD but instead suck the required parts of an existing boot CD of any sort, like e.g. the CD that comes with each Mac or OS upgrade.

b) Even though since Panther Mac OS X and even more critically so Mac OS X Server support a case sensitive variant of HFS+ called HFSX, DiskWarrior still has no support for that file system variant. If you run a case-sensitive HFS file system on your server (which is a good idea for a variety of reasons), then you were SOL if something happened to the file system. Just very recently TechTool Pro 4.0.4 jumped as the first party into that opportunity and now supports case-sensitive HFS file systems.

If DW would address these two points, it would be darn near perfect for what it's supposed to do.