I'm sure there are some architectural reasons why games don't talk, but just think if TF2 was cross platform online play. How bad would XBOX 360 players do vs people with keyboard and mouse. I think they would be at a HUGE disadvantage because they don't have anywhere close to the same control scheme. This destroys all balance to the game. Granted you can buy an adaptor to use keyboard and mouse on the 360, but i don't think that more than the top 2% of hardcore games go so far as to buy a $100 add on to do it.

So when can I buy my working Light Saber?

I think the point most people are missing is that, sure it is cheaper to buy from an alternate reseller and install yourself, however the average Joe, isn't able to install himself. The other thing is that you are paying for the labor of a professional to install the item, as well as (in this case) the apple care provided with the item. I have a feeling that apple would frown at opening a computer and seeing 3rd party ram. Another note is that if you take apple.com and dell.com and compare computers, apple's are actually cheaper for what you get. Granted you need to compare EXACT components. Dell likes to cut corners on features most people fail to look for... such as cache on the processor. Go ahead, try it. The problem most people think to be apple being so overpriced is a misconception, really they just don't carry a low end model, they only go down to upper mid-range.