Can anyone ID this font - or is custom like so many other perfume and fashion designers’ logos?

You might go the route of a face that is already hybridized like ITC Binary or Golota.
Rotis already has a semiserif.
Cicero isn’t bad either
http://www.myfonts.com/fonts/presencetypo/cicero/
other examples at myfonts
http://www.myfonts.com/search?search%5Btext%5D=semiserif
Check out New Age as well
Yes, but not quite: http://www.typophile.com/node/16604
Captured from web.archive.org on 9 Aug 2007. view this capture