If you are interested in keeping up with what is happening with Search Engines there are a few blogs that every webmaster should read.
Googles
WebMaster Central
Matt Cutts
Blog
Yahoos
Blog
MSN
Blog
If you want to keep up with general information about Google, and whats new then I would add the Google
Blog
You will get a lot of helpful information that can help you with the SEs, if you read these blogs.
