One way to use tags in this scenario (I haven't, but I've contemplated it) is that you can use them to indicate what items some of you need to read or have read.
You might need 10 new tags for this: person(x)-unread for each person in your group. A rule can be set up so that all incoming email is tagged with person-unread for all the people in the group.
Whoever reads an email first can categorize it properly, and can also remove their unread tag. Setup a filter for each person, so that they can see the items tagged unread for them.
I'm not sure how you would do this just with folders, but it lets you solve the problem (which you might not be suffering from) of emails getting lost.
Slashdot Mirror
One way to use tags in this scenario (I haven't, but I've contemplated it) is that you can use them to indicate what items some of you need to read or have read. You might need 10 new tags for this: person(x)-unread for each person in your group. A rule can be set up so that all incoming email is tagged with person-unread for all the people in the group. Whoever reads an email first can categorize it properly, and can also remove their unread tag. Setup a filter for each person, so that they can see the items tagged unread for them. I'm not sure how you would do this just with folders, but it lets you solve the problem (which you might not be suffering from) of emails getting lost.