Well if we're going to do networks too then here's mine :P
It's a pretty crappy diagram.
This is the core switch, it's a TP-Link TL-SG3424 24 port managed gigabit switch. This switch connects the servers and the router as well as the access point and switch in the living room. You can also see two PoE injectors, one is for the modem and the other is for the access point.
This is the back of the file and VM server. There's a four port link aggregation there which is used by the file server as well as being bridged to the VMs. The cable which connects to the on board NIC is a mirror of the public network interface on the router, this goes to a VM I use for network monitoring so I can keep an eye on the public network traffic. Right down the bottom you can sort of see the fibre for the 10gbps connection which goes to the other file server
This is the back of the second file server, it has a two port link aggregation and another cable for the IMPI interface. At the top you can see the fibre cable for the 10gbps conenction.
This is the back of the router, I have two two port link aggregations for the LAN and DMZ networks and two other interfaces for the WAN and public networks. The WAN cable goes up to the PoE injector and then out to another room where the modem is.
Here you can see the four cables which lead out to the rest of the house. Two are a link aggregation which connects to the other switch, one goes to the modem and the other is for the access point. I'm renting which is why so I can't run the cables through the walls but this works fine.
This is the living room switch, it connects my gaming PC, HTPC, consoles, etc. to the network.
The access point is up on top of the TV as I'm not able to mount it to the ceiling. It works fine up here though.
Here's the modem, it's all the way over in the kitchen as that's where the only phone jack is. I use the PoE splitter to power the modem from the UPS in the other room, that way the internet will stay up if the power goes out. You can also see the great job I did wiring the PoE splitter to the modem :P They grey cable is used to give me access to the modem's settings, while the other cable goes to the router.