I totally agree about the URLs. We decided not to launch with human readable URLs since we didn't want to deal with the namespacing issues right away. i.e. /user/post vs /collection/post vs just /post. I'm a huge fan of URLs as part of the interface, so I'm sure its something we'll implement.
Just seconding Dan's answer here, I'm a big fan of human readable URLs as well. They are on our roadmap but we didn't include them in this initial release for reasons including but limited to the namespace issues Dan mentioned.
As Ev said in his post this release is a preview and we're not done by any stretch of the imagination.
