You can sail it with other people now, at meerbeter.com.
Each lake runs on the server as its own little world, so everyone in it shares one set of boats, one water police, one ranger having one bad day. Four lakes, eight players each: the ceiling is built into the thing rather than bolted on, which is how a hobby project stays a hobby project and not a bill.
No download, no account. Open the page, sign the waiver, take a boat out.
MeerBeter Vinkeveen Vice, meerbeter.com