I agree about the Portababy type of carrier. I also agree with Roody about the shaken baby but it was brought to my attention by a BFer that was just concerned. 30 years ago, I used a backpack to carry my little girl on afternoon rides on my back and now I shudder at the thoughts of some civilian calling DSS on me. :-) She was old enough to hold her head up and enjoy the ride. I have also heard of child bike carts that have a sling type of arrangement for small babies but can't find it now. Also our Sams Club has a cart that has adjustable springs which is also a joggin stroller for about $200. I'll get the name of it next trip. I read somewhere (internet) recently about a couple that took their very young baby (can't remember age but he was nursing still) tent camping in a bike cart and it was great. Wife/mommy blogged about it. Think they used the child/baby car seat strapped in the cart plus cushions f neck support.