I probably shouldn't post this so soon without a reply, but I think this should lend credibility to my claim:
2007-02-24 19:18:30 - Incrementing game to round 8
2007-02-24 20:56:34 - pologuy receives 2 armies for holding South America
2007-02-24 20:56:34 - pologuy receives 8 armies for 25 territories
2007-02-24 20:56:40 - pologuy cashed in a set of Eastern United States, Greenland, and Great Britain worth 20 armies
2007-02-24 20:56:40 - pologuy gets bonus of 2 armies added to Eastern United States
2007-02-24 20:56:40 - pologuy gets bonus of 2 armies added to Greenland
2007-02-24 20:56:40 - pologuy gets bonus of 2 armies added to Great Britain
2007-02-24 20:56:52 - pologuy deployed 30 armies on North Africa
2007-02-24 20:56:57 - pologuy attacked Egypt from North Africa and conquered it from Jarlaxle
2007-02-24 20:57:07 - pologuy attacked Middle East from Egypt and conquered it from Jarlaxle
2007-02-24 20:57:19 - pologuy attacked Ukraine from Middle East and conquered it from Jarlaxle
2007-02-24 20:57:30 - Jarlaxle receives 2 armies for holding Oceania
2007-02-24 20:57:30 - Jarlaxle receives 4 armies for 12 territories
2007-02-24 20:57:34 - pologuy attacked Ural from Ukraine and conquered it from Jarlaxle
2007-02-24 20:57:45 - Jarlaxle cashed in a set of Irkutsk, Central America, and Congo worth 25 armies
2007-02-24 20:57:45 - Jarlaxle gets bonus of 2 armies added to Irkutsk
2007-02-24 20:57:52 - TheBigBrownBear receives 3 armies for 2 territories
2007-02-24 20:57:59 - Jarlaxle deployed 31 armies on Afghanistan
2007-02-24 20:58:00 - TheBigBrownBear cashed in a set of Afghanistan, Yakutsk, and Indonesia worth 30 armies
2007-02-24 20:58:11 - TheBigBrownBear deployed 33 armies on Ural
2007-02-24 20:58:15 - Jarlaxle attacked Ukraine from Afghanistan and conquered it from pologuy
2007-02-24 20:58:28 - Jarlaxle attacked Scandinavia from Ukraine and conquered it from pologuy
2007-02-24 20:58:38 - pologuy attacked Ukraine from Ural and conquered it from Jarlaxle
2007-02-24 20:58:41 - Jarlaxle attacked Iceland from Scandinavia and conquered it from pologuy
2007-02-24 20:58:49 - pologuy attacked Scandinavia from Ukraine and conquered it from Jarlaxle
2007-02-24 20:58:57 - pologuy attacked Iceland from Scandinavia and conquered it from Jarlaxle
2007-02-24 21:01:14 - pologuy fortified Siberia with 18 armies from Scandinavia
2007-02-24 21:01:30 - pologuy fortified Middle East with 2 armies from Great Britain
2007-02-24 21:01:41 - pologuy fortified Ontario with 1 armies from Eastern United States
2007-02-24 21:02:19 - pologuy fortified Ukraine with 1 armies from Siberia
As you notice, polo guy started to attack me, trying to wipe out everything I had left... However, I was on at this time, having recently posted my suspicion that they are multi's...
Seeing that he was about to wipe out everything I had left, I cashed in my cards. I was almost all the way to getting the final two armies he had left to his other account when he cashed them and used them to wipe out my attacking armies. If this isn't enough to prove they are the same damn person I give up.