Resources: Sharepoint Page Layouts, Custom/Application Pages and Master Pages

Create a New Page Layout in SharePoint 2007 – Feature-Based

SharePoint Application Page with Custom Controls

Creating an Application Page in Windows SharePoint Services 3.0

Adding a “Last Modified” Date on SharePoint Pages 

Master Pages:

How to Create a SharePoint Server 2007 Custom Master Page and Page Layouts for a Web Content Management Site

Setting SharePoint Web Master Pages Programmatically

Unable to Change Site MasterPage

CleverWorkarounds » SharePoint Branding – How CSS works with master pages – Part 1

CleverWorkarounds » SharePoint Branding – How CSS works with master pages – Part 2

CleverWorkarounds » SharePoint Branding – How CSS works with master pages – Part 3

CleverWorkarounds » SharePoint Branding Part 4 – Packaging up your masterpiece into a Feature

CleverWorkarounds » SharePoint Branding Part 5 – Feature Improvements and Bugs