I see from your Question and your comment on some of the answers that you'd prefer a way to do this without doing anything on the Windows boxes.
Does anyone know if web browsers on Windows can hit the personal web sharing on other Windows boxes based on their NetBIOS Name Service / WINS names (that is, the names you'd use when mapping a remote SMB share to a drive letter -- like "\SERVERNAME\SHARENAME\")?
I ask because Macs can participate in NetBIOS Name Service and even register with WINS servers, but it might not be activated until you turn on Windows-style SMB file sharing:
- Go to the "Sharing" pane of System Preferences.
- Check the "File Sharing" checkbox.
- Hit the "Options..." button.
- Check the "Share files and folders using SMB (Windows)" checkbox.
- Now go to the "Network" pane of System Preferences.
- Select your usual network interface and hit "Advanced..."
- Click on the "WINS" tab.
- Pick a Windows-style hostname and workgroup for your Mac
- Optionally specify a WINS server to use (if your site already has a WINS server, they probably give this information out via DHCP already).
One last helpful note: Starting in Vista, Microsoft put something Bonjour-like into Windows, called Link-Local Multicast Name Resolution (LLMNR). Unfortunately, it's not interoperable with Bonjour, and most Windows users are still on XP anyway. I don't know of any LLMNR implementations for Mac OS X.
The Wikipedia article on Zero Configuration Networking (i.e. IETF ZeroConf, etc.) provides a helpful overview of different technologies and their current status.