iFrames: SEO, Usability, Accessibility

1. iFrames and SEO

1.1. Do iFrames pass PageRank?

1.2. How Google treats iFrames

2. iFrames and Accessibility

2.1. Inclduing a direct link within an iFrame

2.2. Including a text description within iFrame

3. Examples of iFrames

3.1. Sliding puzzle

3.2. Google element

3.3. Mind maps

4. Usability