Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20)
You can also click on the Apple menu at the top left of the screen and select "About this Mac" the click more info to bring up your system profiler. This will tell you anything that you want to know about the hardware in your mac.