Even if you're not planning to use PBW to continue the game, you might find it helpful to read the PBW FAQ; it covers a lot of what you need to know about hosting a game.
Section 1.14 in particular discusses converting a PBEM game to PBW. I've never played a TCP/IP game, so I don't know what issues are involved there.
capnq
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"Good morning, Pooh Bear," said Eeyore gloomily. "If it is a good morning," he said. "Which I doubt," said he.