Here's a list of tools that you might find helpful for developing accessible websites and/or software.
Full description and download available at: Sim Daltonism (click opens new window)
Angie Byron of the Lullabots wants to improve standards-compliance in theming in the upcoming version of Drupal has posted the following plea on her blog:
If table-based layouts offend you on a deeply personal level, we need your help!
456 Berea St.– accessibility blog Use It– Jakob Nielsen usability blog WebAxe– accessibility blog