atm there is 70+ games that you will be able to play on kai. (once PS2 support goes online)
its got to be easier to break them down into manageble categories.
i do agree that the quicker and easier it is to find the game arena that you want the better.
also once kai 7 gets released you will see benefits to having it structured this way, as you will be able to tell at a glance how many people are playing a certain type of game on that console.
ie. if you want to see how many people are playing sports games on the xbox, you can tell by sitting in arena's xbox and you will see the most popular category, then you can expand on that by entering the sports category and see what sports game is being played the most at the moment.
This information may help choose what game to buy next.

perhaps we could ask nintendo, sony and MS to advertise xlink as it helps sell units

the information would certainly help me in deciding what type of tournament to run next. (no point running a tourney when theres no one playing)