my daughter is 7 weeks old and i'm very glad we had her...
LOL ! She's a beauty... my second was 1 month yesterday. At that age, they don't do much - about 3 months is where they start to come out a bit more and you start to see the first inklings of a personality. Her big brother is 7 years old - now that's an age at which they are just heaps of fun.
A son is a real blessing for a guy - it really does allow you to do stuff you couldn't really do on your own and not have people looking at you as if you are a lunatic.
My second is a girl - I still have to see how that plays out...