Etcétera
PubSub
PubSub is a nice site for keeping track of new content as it appears on the net. From the description:Today, PubSub reads over 23 million weblogs, more than 50,000 internet newsgroups and all SEC (EDGAR) filings. In the coming months, we'll be adding many more streams of data, so stay tuned!
So at this time it is more 'blog' focused but depending what you are interested in that is ok. I have found it is best to use a very narrow query to avoid spurious results.