Hi Everyone Thanks for your questions, comments and suggestions. Sorry it's taken so long to get back to you - being a newbie I had some problems responding to the list but Holly's helped me fix that (thanks Holly!) First, I should clarify that I am in no way trying to subvert either Facebook's Terms of Service or Research Ethics through my project - I'm trying to put them together and identify areas where they don't seem to match up so I can highlight them and provide possible solutions to them in my Ethics application. I'm doing this now rather than later in the process to determine if such a project is even feasible. Re: FB's Terms of Service, I've gone through them extensively (and with a fine-toothed comb!) but being a newbie to the list wasn't sure if this was the right place to air my specific questions about them and take up in-box space - I've had several people go over my specific concerns off list (thank you!), and if anyone else is interested in doing so, please feel free to get in touch. I should probably have been clearer about the project - when I said using Facebook as a site for an 'intervention' I meant an experiment, using a Facebook application to provide participants with information on their profile pages, which would also be observable (and subject to comments) from their friends. Both the participants and their friends would have to consent to the project - deception is not part of the design and will not be used. Jennifer, thanks for the direct to Stephanie's stuff - I'll take a look at it. Cheers MB