I am new to .NET development, and would like to get a handle on IIS, what resources do people think are the best?
Definitely start at the official learning IIS site: Learn.IIS.net
There's a Getting Started section where you can pick and choose what you want to focus on.
The first few bullets show us that the content is focused on:
There are blogs there from the IIS team and other Microsofties. Books are on showcase, lots of downloads, and a whole set of forums.