Home Networking - I need help

[admin at kclinux.net]

-firewalled central server hooked up to a wireless router, connected to 
broadband DSL via a static IP.

Simple enough.

-small cube computer (maybe something roughly like a PIII 1.0Ghz, 512MB 
RAM, 20GB HD) connected directly to the central server via a physical 
100Mbps ethernet connection, hooked up to one of the inputs on our TV so 
that anyone could sit down and easily decide to browse the internet or 
check their mail while not having to get up from the couch. I would like 
to allow for access to other computers around the house as well as the 
internet.

I highly suggest a Shuttle barebones system. (MicroCenter has some, but you
can find them cheaper online.)

-a voice mail server for the phone to replace the answering machine, 
allowing for extensions to be dialed along with the phone number (or 
after the phone is reached) so that you don't require different phone 
lines to reach different areas around the house depending on who you're 
trying to reach.  This would also be physically connected via 100Mbps 
ethernet link to the central server where all the voice messages would 
be stored.  Or would it be better to store the messages locally on the 
voice mail server and leave it disconnected from the rest of the network?

http://vocpsystem.com/

-A computer in every room wirelessly connected to the central server 
allowing for internet access.  I would like all of these computers to 
have access to voice mail, internet, etc.

If your house is 2 stories, I might suggest another access point on the 2nd
floor in the future.  The signal might be a little weak, but this isn't
necessary to start it off.

-I would like to create a small intranet for the household

Have that setup on your firewall system with apache only serving the
internal addresses.

-A mail server (I could use the central server for that) for email sent 
within the local intranet.  Also, I would like the mail server to be 
used for the sending and receiving of emial to and from the internet, 
along with a registered domain, thus eliminating the dependence on our ISP.

Find someone to host your DNS.

-make the house a wireless access point for laptops.

Good.

-I would like the intranet to contain various locally served HTML pages 
for various things.

Apache on firewall again.