Game Networking

I have been reading up on what is necessary to do game networking, and yes there is a lot that goes into it.  In reading about the history of game networking I found that the evolution has changed based on the technology available at the time (you can read more about it here).  One interesting thing that I feel bears looking back into is what is known as a pure server/client set up.  Basically the game will exist on the server only, and clients act as a dumb terminal that only accepts inputs and displays game output.  I have already said that I would like this game to go on Onlive, and since the Onlive system essentially uses this concept already it would be very simple to take it one step further.  This means that there would only be one game being rendered, with players logging into this game and seeing it from their viewpoint.  It would be the same experience as playing on a LAN, which is something Onlive touts as being one of it's strengths.

So long story short, I will probably set up the game to run on this pure server paradigm.  Also I looked into the profit share on Onlive and it is a 60/40 split, which is a little higher than some of the other systems, but is understandable as they have server upkeep and bandwidth costs.  My goal would be to make it into the playpack, but we'll have to see how things go.

The Official Google TV Blog: OnLive: Console-class Gaming Comes to Google TV

Ok this could be big news for cloud gaming. If Google starts supporting it with the large amount of server power and it's amazing amount of internet influence then we could see it really take off.

The Official Google TV Blog: OnLive: Console-class Gaming Comes to Google TV: Videogames just took a huge leap into the future with OnLive cloud gaming on Google TV. With Google TV, you take it for granted that y...

Which platform?

Ok today's question is this:
What platforms will you support? Vista? XP? Other MS? Linux? MacOS? Consoles? Handhelds? Phones? Browsers?
This is something that I can't determine right now.  If I am successful in going with something like Onlive then this will be an easy question as Onlive is already supported on many different platforms.  In the event that I am not able to work out this deal, I will most likely make an .exe file for people to download which then connects to the server.  I would prefer to avoid this as anything put into the client can be hacked, which will ruin a game faster than anything I'm aware of.  So this is one that is going to have to wait until I've gathered more information.