The OLPC beta OS booted up without any issue, so i first entered a name, choosed my color by clicking on the human looking button and logged in by clicking the > button. The screen is a bit small, but it will do for now.
I gleamed the User Interface to see how to go about navigating the initial interface. This was pretty intutitve for me, just had think a little to figure out how to get back to the navigation icons when an application was open. When an app is opened it takes up the whole screen, but realized one had to bring the cursor to the edge of the screen to get back the navigation buttons.
All of the applications I opened were functional. I was able to get online, type a basic message in write, did some calculations with calculator and so on. I was a bit puzzled by the camera application though, was not sure if it was for a web cam, a digital camera connected to the pc, or just a picture viewer.