Personally, I am a HUGE networking geek. I'll try to start at the beginning.
I have a small home network, growing by the day. My Internet connection is broadband, channeled through a Linksys 4-port Cable/DSL Router. That connection is split to my main Linux Server, my Win98/Redhat 7.2 Desktop machine, and a seperate 8-port switch which can take wired connections from friends, and also connects my Linksys WAP11 wireless access point.
At this point, my network is bridged over the wireless connection to yet another Linksys WAP11, which connects into a 5-port switch in my room. This switch connects my other two servers - my SPARCstation 20 and my Testing Server. Two notebooks in the house can also connect to the WAP over an 802.11b wireless connection.
Whew! Now that that's over, let me know what you guys are running in your homes. I think it would be cool to try to impress each other :-)