>>The settings on the routers aren't too paranoid. The firewall doesn't do much, and it's on only one machine - most of the trouble is handled by the router(s).
>
>How many subnets ? Using the wireless (one thing I am really afraid of<g>) ? Daughter smart enough not to get into trouble (at least computerwise - and how/when can you tell <g>)

No subnets, just one flat home network. Daughters are geeks anyway, the younger is in 10th grade and the middle is a programmer. Any restrictions and I'd be the first to be PO'd over them, and then they'd be all over me complaining. Ergo, flat and all internal doors open. Well, none intentionally locked, that is.

We didn't even bother to make sure every machine can print, or that everyone sees everyone else's shares. Whenever there's a need for something like that, there's a machine next door which can do what yours can't. Or just put your file(s) on a thumbdrive and carry them over.