webdiplomacy.net

So I recently started a 10 min phase game that will start about 35 hours later. As I understand it, if enough people joins, the game will still start more than a day later. Or will it start immediately after all players have joined?

Live games start at the set time (if enough players joined). Non-live games start immediately when filled up.

at what point is a game considered live?

All 5, 7, and 10 minute phases are considered live. The site also has phase lengths ranging from 15 minutes to 4 hours or more but those games never actually happen due to the inconvenient phase length.