I've used the Custom Status feature in the Edit Flow plugin but would like to see a couple useful features added to this:
1. Add the Status to the Filter list (i.e. All | Published | {Custom Status})
2. Add more Edit options to a Custom Status like the $args listed in the Codex.
Also, is a Custom Status able to be queried on the front end, or NOT queried?
http://wordpress.org/extend/plugins/edit-flow/
1. Add the Status to the Filter list (i.e. All | Published | {Custom Status})
These filter links should actually be added already. Are they not in your case? Does the issue persist when you deactivate all other plugins?
2. Add more Edit options to a Custom Status like the $args listed in the Codex.
Great suggestion, I've added it as a request
Also, is a Custom Status able to be queried on the front end, or NOT queried?
You should be able to query custom statuses from the front end.
I eventually did see the Status in the filter list. I just had to refresh the page. Also, I'm assuming that any status besides Publish is hidden from the front-end. Correct?
Yes, the normal WP_Query will only pull posts with the 'publish' post status. You can include other statuses in the query if you'd like.