The underlying OS looks to be Debian 4.0.
At this point it looks like the major server applications I will be using will include:
Bacula -- for system backups, incremental backups and bare metal restores
Samba -- obviously for Windows compatibility. But not so obvious, operate it in Domain Controller mode for both Windows and Linux logon account control eliminating the need for a Win2K3 Server.
Apache, obvious choice.
MySql, again, it seems as if 90% of the applications out there need this as a dependency.
GNU C, C++ compilers
FireFox 2.0x for the web browser interface. It has an especially consistent appearance across both Linux and Windows desktops.
A DNS tertiary server coupled with a DHCP server, no choices here yet. Samba offers a DHCP service coupled with a WINS server (a good thing to have for Windows boxes) that might become the defacto DHCP service.
LDAP, I'm not completely convinced that I need this service in a small network. It might come up as a dependency at some point.
Some sort of Digital Video Recorder package with a video capture card will be a secondary upgrade item. Although it might be cheaper to buy a a DVD player with a digital output port on it instead and just use it to feed digital video to the hard drive.
I personally think that that Remote Access from an Internet location into the home network desktops is asking for trouble. I will not implement that on the first iteration of the system. Likewise serving digital media files to the Internet is again asking for trouble. DMZ's were made for these situations. I can't see most home owners wanting to invite worldwide hackers into their home virtually.
Using Kerberos, RADIUS and VPN technology for remote access and/or control is a possibility.
I can see it setup to download RSS, email, news feeds from specific sites, weather maps and forecasts from weather services, traffic updates etc.
MythTV is definitely going to be a project for the future and most likely on another computer.