Ah, the fun of managing your social network connections. As you say, sometimes you friend someone on Facebook (or any other social network) just to realize that they don't use it the same way you do. If you use the Web interface you can just "hide" their updates so they generally fade into the background, but if you're using the iPhone app, which could do with a bit of a facelift, then you're kinda stuck. No way to hide or mute people or discussions, unfortunately.

Except you can unfriend them from within the Facebook iPhone app. Of course, it can be a bit like using a Howitzer to kill a fly if it's just an annoying update or two, but I'm going to leave the question of when it's appropriate to you, dear reader, and not worry about whether it's justified or not. That's your thing. :-)

Within the Facebook app, it's just two taps to go from having a friend to, well, not. I'll show you by unfriending my friend Shawn Collins (don't worry, Shawn, I didn't really unfriend you. You were just a convenient demo guinea pig).

Here I am checking out the News Feed from Facebook on my iPhone:

See that update in the middle, from Shawn Collins? Yeah, I don't want to follow him any more. I have a pathological hate of anyone who cites cnn.com. Or something like that. :-)

To unfriend him, I simply tap on his name in the News Feed view and wait as it loads his profile:

See the icon on the top right with the arrow coming out of the square? Tap on it...

There's what we seek. The red "Unfriend" button. Tap on it and all you have to do is confirm you really want to sever the tie:

One more tap on "Unfriend" and it's b'bye!