What will this app do different from my current FAQ page, why should I sign up with your service?
If you have an faq with more than a few entries this product will make it much easier to browse and search. The search handles stemming and synonyms to help users find what they are looking for. It is also a content management system so it is easy to add/edit/delete without touching html or your website.
On the administration side it also has interesting analytics to show what people are searching on, what categories they browse and what answers they look at.
Sunbeam is an AJAX based self help module for websites.