Bukkit being the official server API would be great. Doubt that it will happen though.
aConfig.getInt(player.getName() + ".balance"); or aConfig.getInt("coldandtired.balance");
After reading all 3 pages, this has actually gotten very interesting. Will watch.
You can also use just Bukkit.* instead of getServer().*
Daniel is doing it right. IIRC it also picks up display names?
Separate names with a comma.