When you're working with a commercial software company, it's easy to keep up with their latest news: Between the company's Web sites, e-mail newsletters, conferences, and (increasingly) blogs, you can find out what is happening, and prepare yourself accordingly. Life in the open-source world is quite a bit messier, of course, in that there often isn't any central location or source for news. One of the key tools that the open-source community uses to keep in touch is blogs -- but it's not always easy to find all of the blogs on the subjects that interest you. That's where blog planets come in, providing a one-stop aggregation of many blogs on a particular subject.
