It will be good to have one place to go, a trusted game, that always starts and ends at the same time, that pays instantly. I think it will be big for you.
1) Use a different payment address for each game even if you still have to go through current interface, just to make block explorer checks easier
I'm not sure the SCI has that option, but I understand what you are saying. I'll leave a message for them.
2) make the UI experience a little better and cleaner, some graphics, maybe a pager for the entry list because it will get long, the ability to see archived games, etc
I've just been double checking the code for the past few days. I've got a template I'm working on for it, just may take a few hours to implement it.
As for the archived games, this game won't be possible to archive this game (well maybe...actually, that may be possible).
I kind of wanted to add a paging feature to view all the players for the current round and only show like 10 people per page (left side will show the last paid and the person next to get paid).
3) Allow people to post a short message with their bet - make it like 80 characters or something, can use to advertise or to taunt other players or for nothing at all (just an idea, could be fun)
I may do this under a different database as to not interfere with the game.
[Also, I'm sure someone may have a question about payments...]: I just added a new feature to make sure no one can spend anything lower than the current limit (well, I'm only allowing 10 past instead of the 11 that's known with BTC).