I personally feel that that is too young. I know someone who wanted too put a 2 year old on a buggy board and Mothercare advised against it. Maybe you could put the baby in a sling for a couple of months until she is a bit older and can safely go on the buggy board?
I would have thought she'd be ok by then. I have taken an 18month toddler on one for a short distance and although he was unsure at first he soon got the hang of it.
Thanks everyone for the replies and links - I should have said that I wouldn't want to use the buggy board on long journeys, she'll have her own pushchair for times when we'll be out for ages. That's weird about mothercare because they sell a buggy board recomended for ages 2-5 yrs!
This two year is very little though. Wouldn't put my two year olds on a buggy board - one wouldn't be bothered to stand on it (tiny bit lazy) and the other one would be trying to leg it!