One nice thing about GitHub and Bitbucket's focus on the project's README is that more software projects are providing a good, instantly-readable summary of their project in the README instead of making you have to go elsewhere to find out what it's all about and how to get started.

One not-so-nice thing about GitHub and Bitbucket's focus on the project's README is that I have noticed several projects that dump all their project's documentation into the README and the examples instead of having proper narrative and API documentation.