http://www.banane.com/workblog/?p=32
Tips: How to Design For Images-Off
- Use of non-image HTML techniques, such as colored background tables and colored text.
- Enticing, clever alt-tags that induce viewers to select “images on”
- Reducing the number of images above the fold
- Not relying on one large image for your email
- For tabbed headers and menu header, using tables and text instead of small images