A new post at SEOmoz shared a detailed 57-point checklist for performing a technical audit on a web site for verifying the site meets many of the SEO requirements.
This checklist is extremely comprehensive and can aid new and existing SEOs on preparing a technical audit for their clients.
The checklist goes through the following areas:
Content
Duplicate Content
Accessibility
Site Architecture
Technical Issues
Canonicalization
URLs
Internal Linking
Title Tags
Meta Tags
This might be a great start for those looking to really tear apart their site from a technical and web developer point of view, when considering SEO challenges.
Forum discussion at Sphinn.