....if you want to sync specific users, just make one group called IPOD and drag all the people into that group, (it does not move, it bookmarks) and then tell the ipod to just sync that group...
Thanks for that. It works fine although there is an interesting bit of peculiar behaviour. When a new group is created in Address Book, and is the only one selected for synching to the iPod, iTunes will also copy unselected groups where a contact is common.
For example: Mary is added to the iPod Group created in Address Book. However, she happens also to be in the existing Address Book Group A and Group B.
When you do the synch, after selecting only the iPod Group, your iPod will also get the unselected Group A and Group B. And, curiously, the Group A and Group B on the iPod will not have all the contacts from the Address Book version of those groups. Mary will be the only name in them.
I'm not sure why Apple sees that as desirable or advantageous.