Ah no, I asked the question badly. Sorry.
I need the network (and occasionally the Bluetooth) running. Turning them off or otherwise disabling them isn't an option. I just don't want the icons cluttering up the bottom right hand corner of the taskbar, since there's nothing useful I can do with them there.
I can set other icons in that corner (Middleware, ZoneAlarm, ActiveSynch etc etc etc) to "Always Hide", and they stay hidden.
These two blighters won't stay hidden. It's not a big deal but would help reduce taskbar clutter.