The Canadian IT Pro Connection blog has a series on how to get things going with the new iSCSI Target software from Microsoft.
The How-To includes lots of good information on _why_ things are being set up the way they were. The article was written by fellow MVP Mitch Garvis who has an awesome ability to teach.
The above article also written by Mitch gives a good explanation for the various types of shared storage and how they operate.
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book