A not-for-profit organisation (In the UK - you can tell by the spelling) is
looking for a cheap way to host a forum for its clients. They are concerned
that it should be easy to use and accessible as they expect a significant
proportion of the users to be elderly and/or with disabilities. Their
website consists of some free pages hosted on Google Apps and they'd like to
be able to link to the forums from there.

All suggestions will be much appreciated.