First blush experience with the Arduino supplied IDE is pretty nice. The Sketch was installed and worked with my laptop w/o any guessing.
The only thing to configure is the serial port, and on my Windows XP laptop which I use for such experiments has only the Arduino on it for this test, and it worked.
On the Mac Mavericks I have on loan, it took a bit of guesswork since there were 8 ports enumerated from the /dev directory. As it turned out it wasn't hard to find, and a youtube video below shows a modifed demo, blink running.
First mission will be to get the PDP11 running and see how it works, and if it works.