When a developer commits a bugfix, I want to be able to open up the relevant JIRA issue and see what Hudson build number contains this fix with the Mercurial changeset listed alongside.
Extra points if this information is listed in its own tab (does not pollute the "comments" tab) but shows up alongside comments when the "all" tab is selected.
Any ideas?
Have a look at the jira plugin for Hudson. It is a simple plugin, that I think should be pretty sufficient for the most use cases.
On the plugin page another project is referenced. The marvelution Jira Hudson Integration project. It comes with two plugins, one for jira and one for Hudson and if the app lives up the promise, it will be an pretty cool tool. I found two different locations to read about it because they are in the process of moving their site to a wiki; old location and new location.