Version/Milestone Roadmap
Summarise version goals into a single list
Example:
http://www.redmine.org/projects/redmine/roadmap
Call me unoriginal, but I believe this feature could be a very useful one for many, by condensing statistics into an easy-to-read form, with each version listed down - both planned and historically. Each version can literally be given a quick summary, an estimated target date, and as issues get ticked and knocked-off the issue list, the "completion" of the version works itself up to 100% - quite obviously:
Progression = (Number of Open Tickets for Version / Number of Total Tickets for Version) * 100
Not a massive life-changer - it won't make me win the lottery, but it's certainly a convenience compared to running through search and filtering by version, and then filtering by version and status, and then performing 50 - 12 on a calculator.
Just another one of my very far-fetched ideas, but if you're up for a challenge... ;-)