Guidelines for Compliance
Accessibility Automated Checkers and Validators
As with all automated validators, these tools provide a beginning for a web accessibility review. They, however, cannot be relied on to provide a complete assessment of web page accessibility. The key to using these tools successfully is to understand how to interpret the results and then proceed with a finer grained analysis.
Adobe Accessibility Blog (Good during product releases, otherwise, a bit quiet.)
Adobe Standards & Accessibility (tagged PDF) (may require a login – free account)