Our experience has been that as soon as we say someone is in the hospital again, our friends and family say, "Is there anything I can do? Do you need meals?" If so, then we've said, "Sure that would be helpful. Can I just email you the information and you can decide." We haven't just populated the website with people's email address on our own. That would be a bit weird. I think if you use it for a friend having a baby (like at the baby shower, everyone writes their email addresses if they want to participate) then you can maintain it and add the mother as a guest so she can view what is happening.
It is one less thing to organize if you have kids in the hospital but internet access. I think everyone at home would just eat cereal every night if we didn't have some help. My husband is definitely not a cook!
Mom 2/cf one w/o