okay firstly, there is only one vaccine available in the uk, tamiflu, as you said. as you may be aware local GP surgeries have started to provide the clinics. personally i am not for the vaccine and will not be taking it, many other health workers that i have met including doctors and nurses are not taking the vaccine. i believe that there is little information available and insufficient testing, but that is my personal opinion. if you go to nhs.net or even google 'tamiflu' i thik this should provide some useful information.
if you are a healthy adult and contract swine flu, most likely you will fight it off like the normal flu and become immune to it. i do not know the answer to whether it is appropriate to newborn children.
all the best