With the addition of a Comments facility in Moodle 2.0 it is now easier than ever for users to give feedback, voice their opinions and generally make their presence felt in your online community. A Comments block may be included on your course page to give the students the opportunity to rate the course or suggest improvements, as shown in the following screenshot:

We get far more control over the location and positioning of blocks in Moodle 2.0. Due to this we're not just restricted to having the Comments block (or others) on our course page. Most screens will allow us to add a block now, so we could for example have comments on the difficulty of Quiz questions, or comments on the suitability of a particular uploaded resource. The same commenting feature has also been applied to the standard Moodle blog, such that users may now, at last, comment on each others' entries.