Excellent series on wireframing

See on UxSoup:

• Wireframing Part Un: Quick intro
• Wireframing Part Deux: Wireframes vs Prototypes
• Wireframing Part Trois: Creating wireframes

I'll watch how it will expand.

Design Pattern Libraries

• UI-Patterns.com
• Pattern Tap
• Patternry
• Elements of Design: A Web Design Showcase
• Yahoo! Design Pattern Library
• Interaction Design Pattern Library (Welie.com)

Thanks to Six Revisions for the list