One way to programatically configure the Logging block. This can come in useful if you have many clients of the logging block, and dont want to sprinkle the required config sections in each of those calling apps app/web.config files.

Currently, I'm looking into this programatic configuration as a fallback -- use the config based setup first, and if it's not there, provide some sensible defaults in the code.

Programatic Configuraton - Enterprise Library (v2.0) Logging Block

Decent intro to Indigo / WCF that walks through creating a simple service.

15 Seconds : Indigo Programming Model