We get a lot of Comments on our photographs, and I would see benefit if Zenphoto had the functionality to better handle them. Filter and Search features would be a great help.
To explain, when a Comment is received it is reviewed, and the Title and Description of the image updated if appropriate. If the Comment is thus closed out, it is marked as SPAM but it remains as a Comment in case it is challenged in the future. If the Comment is not closed out because it is still being reviewed, it remains marked as NOT SPAM. Over time, the NOT SPAM Comments get pushed down the list, so being able to filter out the SPAM and just display the NOT SPAM would be a great asset.
Similarly, Being able to search Comments for a particular word or phrase (e.g. Brunel - a famous engineer) would help with research.

We have some things for comments on the list, like some sorting. but as usual we cannot promise anything regarding when. To be honest comments are not high on our priority list.