Our briefs state that we can make accessible websites - and our demo project is quite good in this regard.

But to convince prospects it would be good to have at least one page where many of the accessiblity features are showcased and that totally complies to the standards:
https://docs.google.com/document/d/19PMI4QtIKV1EW6y-nrbM55VT_tDo1kvy-nKn-Bz6TL0/edit

Section 508: http://www.section508.gov
WCAG AAA: http://www.w3.org/WAI/WCAG2AAA-Conformance