pavlov most hospitals seem to have that patientline thing, but it is rubbish and expensive so i wouldn't recommend it.
Facebook is pretty good on mobile internet, or you can set it up to work via text messages as well. I have facebook saved in my address book, so I can text status updates, which comes in handy for times like this. I also have it text me any replies, although I will be turning that feature off after the birth as it can get annoying. Will be useful when bedbound after the section though.
Should we have a "group" on facebook? Here is the best way to communicate, but as facebook is more easily available, it could make a good backup. I'll set one up, and try to invite anyone who has added me, but I WILL forget some people so please don't be offended!