Some of the info on the FAQ sections on the main site (rather than the forum) are out of date. For example, the Guide to Using an iPhone on giffgaff states that "If you're not on a goodybag, you'll get free data (up to 100MB/day fair use)'" [data is no longer free!]
Keeping FAQ info current is important so as not to mislead members and not to foster confusion.
My idea is to have a clear "last updated on" date on FAQ/Info pages themselves (rather than just on the list of topics), and also to have a link on each FAQ which community members can use to report out of date information, thereby bringing it to gg's attention and allowing them to update it. This could be a simple email link, or a more tailored form which captures the relevant info about the FAQ.
I found dangaff's post on using wikis for FAQs, and while this would perhaps be a longer term solution, I'm not sure that implementation of a wiki is possible on the gg site at present.