To my knowledge, it should still be up... But if the link is down when you are trying to link on the winVICE emulator, then it probably is.
Jeff Ledger is the guy who is developing the server-side of things, but only a few options work on it, like chat and a few multiplayer games.
I do have an RS232 adapter for my C64 and set it up to link using my real c64. :-)