This was my network before moving out of my old apt. The switch is a cisco catalyst 5000 w/ 12 port 10/100 copper blade, 12 port 100baseFX backbone to trunk to the back bedroom's cat 5k and cat 2912. The two machines on the right are 2 identical p3's running freebsd with 4 fast ethernet interfaces(3 cat5, 1 fiber). freevrrpd provides redundacy on the Ipfilter nat'd private side of the network. each box has its own public IP provided by a cox cable modem.
Don't have any pics of the backroom(changed too much to have a worthwhile pic), just the core.
you don't get crosstalk in a modern network with properly made cables. newer, bigger switches let you have over 500 cat5 cables bundled together with 0 problems. i've seen production cabling jobs 100 times worse than my home network. you'd be suprised how badly things are wired at your ISP, big or small.
Mine: Linksys BEFW11S4 ver2 Wireless AP 4 Port router...with a Linksys wireless card for machine downstairs (400kbps DL) and my main rig upstairs is hardwired Cat5...had 3rd machine win2k but its currently off the network because I don't use it