The Raspberry Pi might not be a heavyweight in the specifications department but that is no reason why this inexpensive educational computer shouldn't help you learn more about some of the latest technology used to create web sites. The availability of some of the latest open source software in Arch Linux ARM introduces the exiting possibility of using the device as a mini portable web server (you could even battery power it). This could be very useful, not just for learning about these new technologies but also if you wanted to try your sites out with client machines that may not let you install server software locally, e.g. phones, tablets and set top boxes.
You might find your self in the situation where you have a bit of time to spare, but sadly with an unreliable, absent or just very expensive internet connection. This might happen if you are travelling, maybe on a long distance flight, or staying somewhere without internet facilities. Well now you could be using that time to pick up some new knowledge, maybe taking a course on a subject that has always interested you, or learning new skills to enhance your career. I'm not talking about one of those cheap CD-ROMs you see in computer shops promising to teach you vast amounts of knowledge, but are often disappointing, instead I'm talking about genuine Open University materials that can be loaded onto your computer absolutely free and used interactively when your are offline.