Okay, here's my household's current

gear:
Me:
iMac, 21.5" 3.02GHz Core i3 (2010). This is my main computer; I use it for composing music (GarageBand and Cakewalk SONAR via Boot Camp), as well as converting DVDs via HandBrake and light-to-medium Web surfing. It also serves as the house's main iTunes content server for Home Sharing.
Macbook Pro, 17" Core i5. This is usually my travel machine and a sort of secondary backup for my iMac. When on the road, it serves as our Internet station and portable cinema, as well as a portable GarageBand studio for vocals.
Two iPod nanos, 5th gen, blue and silver. The blue is my main portable media player. The silver one was a replacement for a stolen 2nd gen blue nano, which was my first real piece of Apple hardware; it contains a subset of the blue's music playlists, some family-friendly shorts and movies, and plenty of room for shooting video. They both sync to my iMac.
My wife:
iMac, 21.5" Core i5 (2011). It's the newest

addition to the family. She uses it for storing and manipulating photos, Web surfing and project printing, for now; that usage will expand in the near future, as I'll explain next.
iPod touch, 3rd gen, 32 Gb. This is her main portable media and app device. It's currently synced to an old Compaq XP machine, which serves as an auxiliary iTunes content server from time to time. One of our upcoming projects is a full iTunes library migration to her iMac; she hates how slow iTunes loads and operates in Windows. After the migration, her iMac will be the auxiliary content server.
My daughter:
iPod shuffle 4th gen, 2 Gb, pink. Music player; replaced a Sansa Shaker, which in itself was a nice, kid-friendly little player, but has sadly been discontinued. Currently syncs to the Compaq, and will probably continue to do so, as we plan to repurpose the Compaq for her use once my wife's library has been migrated.
Elsewhere:
Two
tv 2s. One in the main room, one in the master bedroom; for iTunes library playback and NetFlix, with the occasional YouTube video.
Airport Extreme Base Station (2009 with SDB). Our main wireless router as well as a wired network switch for the Ethernet-only Compaq. Its built-in Bonjour proxy wakes up my iMac when my daughter wants to watch something from our library via

tv.