My understanding is that MSM would work in these first two (2) configurations:
1)
http://www.acme-site-1.com
http://www.acme-site-2.com
http://www.acme-site-3.com
2)
site-1.acme.com
site-2.acme.com
site-3.acme.com
Would MSM be able to work in this configuration, i.e., the sub-dir determines the “site”?
http://www.acme.com/site-1/
http://www.acme.com/site-2/
http://www.acme.com/site-3/