Based on the interest in playing a Nation Cup, I think the best next step is to precise the rules and regulations.
1. Each Nation plays with one team consisting of a minimum of 3 players and a maximum of 5 players.
Why have a maximum on number of players? As this is national teams, the teams should be allowed to switch players between the matches. I see no reason to have a maximum.
4. The Nation Cup is played in single-elimination-modus.
This will be a fun and different kind of playing, so I think every team should be able to get more than 1 match.
I think it should start with 4 groups of 4 teams, who play against eachother, and then 3 teams goes through (2 to quarter final and 1 directly to semi final).
2 through from each group would also be a possibility, but I'd prefer 3.
This way each team is guaranteed at least 3 matches.
5. Each round consists of five or three 1on1s respectively and must be played within one week, starting on 19 August 2013.
Every team match should have the same number of individual matches.
For a team, who is playing against a team with better opponents, it would be better to only play 3 matches than 5 (shorter distance means more luck).
7. To determine which players play against each other the captain of each Nation sends me a seeding list (i.e. Game 1: Player A; Game 2: Player B) via PN and I post the pairing opponents.
8. During the round, paired opponents must determine a time to play their match.
I would personally prefer a team match, where you play 1 set matches against more (or all) of the opponent, and have the whole team match at 1 time, but it would probably be too difficult to agree on a time, where all players can play.
12. Ties do not count and the game gets repeated with identical starting players.
I think the starting player should be switched after a tie (but maybe that's just me?).
There's 2 rules I think is missing:
1. A rule regarding setups.
I'd suggest having a rule that says, that the player, who owns the most cards, sets up a random game with all of his/her cards.
2. A rule regarding how much it's allowed to talk with your team members during a match.