XBMC is a very full-featured media center and you will enjoy exploring it and discovering all its features. You will find lots of resources on the Internet about how to use XBMC and install add-ons etc.
Just to highlight a couple of features.
A quick way to make sure the Internet connection is working is to select the Weather option.
XBMC also operates a web server, that means, if you can remote control it through any computer, tablet or phone on the network, just by entering the IP address of your Raspberry Pi.
To find the IP address, go to System and then System Info and you will find the IP address listed.
In the next tutorial http://learn.adafruit.com/using-an-ir-remote-with-a-raspberry-pi-media-center/ we will look at how we can use the Raspberry Pi's GPIO connector to add an Infrared remote to the media center.