Thank you. That cleared up some of the problem.
Yes, I had checked early on through Synaptic that samba-winbind is installed. But when I went looking for where to configure samba, and found the PCC samba wizard, I assumed that it would flag me if anything were lacking regarding the samba setup. It didn't.
Under the Manage System Services, both services were Stopped. I enabled them on boot, started samba, but it would not allow me to start winbind until it was "configured" in smb.conf. That apparently means to uncomment all the winbind options, which I did, despite not knowing what most of them do.
I restarted samba and then was able to start winbind.
Now I can see the share folder I created in linux. But I can also see my entire Home directory structure. What's more, no password query ever arose.
At the same time, linux now cannot see even the workgroup on the lan.
I then went into samba and removes the Homes entry, because I could not get the "Public" options to give it any security. When I did that, now Win7 doesn't see the linux box at all again. I did not touch the individual share folder I had created.
None of this makes sense to me, and I'm sorry to say that I'm getting frustrated at this point.