Good news: my gigabit ethernet switch arrived today.
Bad news: the network card in my old G4 doesn’t support jumbo frames. D’oh!
The switch is a Netgear GS108, by the way. I can’t remember why I plumped for this rather than the ‘domestic’ model (per-port something or other, or maybe the jumbo frame thing, or… something); very cheap at Amazon right now.
Meanwhile, working in front of this many pixels is a joy. Everyone should have two good LCD panels.