Best practices for using these technologies are addressed by other WAI groups, producing guidelines explaining how to use the technologies.
The principal output of this working group is feedback to other W3C working groups developing specification, on how to ensure that their work can allow for accessibility. This does not generally create deliverables in the form of W3C publications.
In particular, the group tries to review at least every Last Call working draft.
The PFWG also works on the XML Accessibility Guidelines (XAG).