That’s perhaps over-stating things a bit, but it’s certainly one of the most useful web hacks I’ve used – and use regularly.
Google search feeds cannot be pulled into Yahoo! Pipes.
Pipes’ slogan “Re-Wire the Web” apparently doesn’t apply to Google. I don’t know if this is a restriction of Yahoo or Google or both, but it’s very annoying if you’re trying to do some heavy-duty monitoring via Google search and want to be able to manipulate the feed before it reaches Google Reader… for example.
Google Feedburner. If you run the Google News/Blog Search feeds through Feedburner and then pull the Feedburner urls into Y!Pipes, all is well. You can manipulate the Google data anyway you like before consuming it.