MSCS Roundup
This article links to all the useful resources I have found that relate to Microsoft 2003 Failover Clustering.
MSCS Terminology
This article defines MSCS terminology:
http://technet.microsoft.com/en-us/library/cc757640.aspx
Server 2003 Cluster Models
There are 3 Cluster Models with Windows Server 2003.
Model 1: Single Node Cluster
In short, this Cluster Model would most likely only be used for testing.
Model 2: Single Quorum Cluster
Standard, Active/Failover (or Active/Active) Cluster.
What most people thing about when they think of MSCS Clustering.
Model 3: Majority Node Set
Not common
Most likely used only by software designed for this type of cluster.
Model 4: [NEW] Majority Node Set (with a Witness)
See this KB for more information:
http://support.microsoft.com/kb/921181
Additional Information
This article explains the models in greater detail:
http://technet.microsoft.com/en-us/library/cc739522.aspx
Server 2008 Cluster Models
Cluster Models in Server 2008 have changed from Server 2003. A full discussion is beyond the scope of this post, but here is a link that discusses them further:
http://technet.microsoft.com/en-us/magazine/cc672627.aspx
Deploying a Single Quorum Cluster
This is the best guide I have ever found:
http://www.microsoft.com/downloads/details.aspx?FamilyID=A5BBB021-0760-48F3-A53B-0351FC3337A1&displaylang=en
Installing SQL Server 2005 into a Failover Cluster
This article isn't very good, but it is the Authoritative document:
http://www.microsoft.com/downloads/details.aspx?FamilyID=818234dc-a17b-4f09-b282-c6830fead499&displaylang=en
Installing IIS into a Failover Cluster
Here are the best articles I have found:
http://support.microsoft.com/kb/887417
http://support.microsoft.com/kb/248025
Clustering Other Things
Instructions about how cluster other services:
http://technet.microsoft.com/en-us/library/cc757729.aspx