Yes. I don't know what the limit is, but we have 2 iPhones and 4 iPods in house and I haven't had any issues yet.
In the preferences menu, they have a Devices tab I think which would show you the limit of how many can be synced per computer. I think it might be 5 devices.
yeah I'm pretty sure its unlimited for all ipods and iphones (they just work for all purchases dont have to be authorised) the 5 limit is for the itunes store computer authorisation
You can name the device the first time that you attach to iTunes. I just went with Name's iPod and Name's iPhone (I have one of each.) His first name's good enough.
My two share everything except things which are iPhone specific. Depending on the age of his iPod, you'll have to be sure to only download apps for Touch, which are different from the older iPod stuff and in a separate part of the App Store.