A great introduction for techie people already familiar with web-design
http://johnaugust.com/archives/2009/kindle-formatting-for-web-geeks
Site for Kindle Formatting Tips
http://kindleformatting.com/index.php
Kindle's Publishing Program Page with goodies like
- KindleGen - a tool for generating .mobe (kindle) files from HTML, ePub, etc files
- KindlePreviewer - a desktop virtual Kindle for testing your code in a 'live' kindle display
http://www.amazon.com/gp/feature.html?ie=UTF8&docId=1000234621
The not-remotely-useful Kindle Publishing Guidelines Document from Amazon
s3.amazonaws.com/kindlegen/AmazonKindlePublishingGuidelines.pdf
A couple of nice web pages for cheatsheets on HTML and CSS compatibility:
http://www.ebookconversion.com/kindle-publishing-guidelines.htm