At the moment I only really have space for one, maybe two people to participate in a play by post fashion. We do occasionally have full, sit-down sessions here - I am experimenting with being able to blend both online and offline play through Google Docs.
That's pretty interesting. I'll take a closer look at it when I get the chance, thanks.
For the moment I'm just sticking with Google Docs 'cause nobody needs anything other than a pre-existing email address to gain access to the content. I don't want to have to ask anyone else to have to sign up to anything, or add another platform which people need to learn to interact with.