IIS 6.0 documentation Library
Way to go Microsoft ! deployment, operation, technical guide and reference + glossary all in ONE brand new URL.
Including SP1 updates as well as some of the interesting addon -
IIS ETW (Event Tracing for Windows)
Configuration of x86 32bit applications on 64bit Windows
IIS Metabase auditing (via iisconfig.vbs, stated in the updated IIS overview doc as well)
Changes in HTTP.SYS