drmlessgames: You can use dosbox directly. You setup a server from your own computer, and all those that are going to play join your server. All yang does is that precisely.
Darkenmal: Can you try to explain that? :P
dos was waay before my time.
Yeah, certainly. You start dosbox. Then, enable IPX networking by typing the command ipx=true. Then you mount the folder blood is installed on your hard drive with the mount c: c:\folder command. Then you start the server with the command ipxnet startserver. After that, all the other clients that are going to join your server join with the command ipxnet connect <your address>. : )
JudasIscariot: I think once Blood releases here you might have better luck finding people on YANG. If that fails, you can always try GamesRanger, Hamachi, Tunngle and the GOG unofficial IRC channel and set up a few multiplayer games with some members...
I've been playing blood online with yang for a while now, since Yang was released. It's awesome, and there are a few regular people making regular servers. They might register and join this GoG community now. :D