Firstly Knitter - oh definitely keep a lock! My mom kept first locks of all of us and I was always amazed at how soft it was! But also - are you SURE you have to cut it??? Just joking, can see practical problem, but he looks adorable. Make sure you take 5 million pics before you cut it!
Scorpio, haven't read the threads in question (bit rushed off my feet today - realised i've got only 1 week of which 1 a bank holiday left before i go away for a month and a million things to do), but in general I think additional education (not re the hows and whats obv, but about the effects it will have on your life) is a good idea. To say that teenage moms are rubbish or scroungers, is however completely out of order. For one, I think you probably have more energy then (and biologically your body is better for childbirth then too). But I have to admit I probably wasn't mature enough to have children as a teenager, and I suspect some teenagers are the same. A lot of older people too however, but I guess they want to try and educate while they can. All I can say for certain is that I'm convinced you're a great mom.
TSC - I started off wanting to say to go to the weigh-in as you know it's fine and the reason for the loss, but then thought about if I was in that situation, and some hv's (peachy's hv assistant springs to mind) seems to be patronising, and the last thing you need is for someone to stress you up further. So I guess as long as everyone is happy and healthy, you could do what you want. Wow, that's a perfectly pointless post from me, isn't it?