As far as I can tell, there are two types of people in the world: those who can listen to music while they work and those who can't. I am firmly in the latter camp, unable to think if someone is even contemplating humming under their breath and preferring complete and utter silence wherever possible.
In the place I've been working for the last week, however, they like to have the radio on. At first I handled this fairly ineffectively, basically just Twittering OMFG THE RADIO IS ON I CAN'T CONCENTRATE ARGHHHH. Then I decided to put my big girl pants on and suck it up and deal with it, and the way in which I did this was Googling "free white noise." And the first page I came to was SimplyNoise.com, which offers streaming audio of white, pink, or brown noise.
Did you know about pink or brown noise? Because I did not! My favorite is the pink noise and contrary to what my boyfriend is going to say when he reads this, it's not just because I like the color pink so much that I choose major kitchen appliances in the color. The pink noise manages to blocks out EVERYTHING around you---seriously, the radio was but a distant memory---while still creating a totally neutral background conducive to work. You can download the noises too and load them on to your iPod, which would be great for plane journeys when you wanted to sleep or read. I bet it would also be perfect for blocking out bloody ESPN SportsCenter when someone is watching it at top volume in the living room while you're trying to write a blog post in the bedroom, but unfortunately I'll have to wait until I'm back home at the end of the month to prove that.