The tech world is full of innovations, nearly every single day. It's impossible to even keep up, let alone move forward. Though it seems like a pain sometimes, truth be told it's a blessing to live in an age when such progress is a daily occurrence.
Sometimes a novelty stands out among the daily inventions, a novelty which appears to be seminal. So it seems to me is the new Yahoo! system they call "Pipes". It's the first truly new thing I can remember seeing on the Internet in a couple of years (say after the introduction of the social AJAX sites like Digg). Pipes is a mechanism by which you the user can create an internet application all of your own—by requiring little more on your part than dragging and dropping. It's a reference to pipes in Unix, for all you Unix programmers, but now refers to internet processes rather than shell utilities. There's a good explanation here and here. Check it out.