The most recent nightly builds of WebKit have repaired many longstanding access issues. The most notable of the current fixes is the exposure of some web form controls to access solutions, including VoiceOver.

When these changes make their way into the official WebKit release, and then into Safari and Mac OS X, we will be able to enjoy these fixes with VoiceOver. In the mean time, you can download the nightly builds of WebKit and use them without risk to the OS’s core installation of the HTML engine from WebKit.org. The nightly build will install an application in your "Applications" folder to allow you to run a dedicated test browser with the latest fixes to WebKit. Of course, as this is a nightly build, there will be bugs, stability, and other issues, so you will likely want to continue using Safari or whatever your browser of choice is, as your default.