There are several ways to track technology news/info:
1. Here is a simple way I track HackerNews. I use InfoMinder, our tool but there are others available, some free.
2. Another tool I use is TopicMinder (our custom topic search engine). You can use Google alerts too. Google alerts is a bit broader and TopicMinder is a bit deeper (and more specialized in scope).
If you are a developer, you can use some of the page diff libraries to build your own tracker, as well. Here is a stack overflow discussing on tracking web pages using Python/PHP/Java