OK - here's the scoop on baselayout. baselayout-1.8.0 killed the networking on my workstation. When I rebooted it - no network. It looks like the netmount script may be messed up. I re-emerged the down-rev version ... updated the cfg files in /etc ... rebooted ... worked perfectly again. I would not have emerged 1.8.0 except that it was unmasked for a brief time in error by the developers.
There was no changes to the /etc/init.d/net.* files, or anything else related to networking. Check that etc-update (if using that) didnt mess things up again, or that you maybe did not replace /etc/conf.d/net by mistake. Thanks.
Hrm, sorry, didnt read the other mail until now. /etc/init.d/netmount did change some. Can you cp it from the latest rc-scripts .tbz2 and maybe try to debug why it fails ? Also, If it is problematic, it should not kill the entire networking.
Just thinking about it .. do you have nfs mounts, and if so, do you have portmap added to your default runlevel ?
I have a theory on this. etc-update was borken for a short time, wouldn't update permissions correctly for /etc/init.d files, perhaps that was all that got messed up? if you feel up to it, try baselayout-1.8.0 again and update any files using the latest gentoolkit revision available...