<p>We use <a href="http://trac.edgewall.org" rel="nofollow noreferrer">Trac</a> as our bug tracking / development / wiki system and I was wondering if anyone has experience and uses some of the Trac Agile/Scrum plugins or functionalities? Anything you'd recommend?</p>

<p>Or would it be better to duplicate Trac tickets as dead-tree user story index cards and a hand-drawn burndown chart?</p>

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<p>Note that I found a similar question <a href="https://stackoverflow.com/questions/81144">here</a>. Though it's specifically about Scrum. They recommend <a href="http://www.agile42.com/cms/pages/download/" rel="nofollow noreferrer">Agilo</a>. Has anyone tried Agilo yet?</p>

Bitten
is a Trac plugin for continuous integration that can be harnessed to do automatic builds on check-in, which provides a critical part of the Agile process (rapid feedback). I haven't used any other plugins for Trac personally, so I can't comment on them. However, the native Trac functionality of milestones could be leveraged fairly easily, I suspect, to be used as iteration markers (where each milestone represents the end of an iteration). Since milestones can be used to mark a 'due date' for features already, you shouldn't need much in the way of modification to use them as such.
From there, using tickets as user stories, and tying them to milestones (I'm sure this can be done manually at worst) would give you a basic method of tracking velocity and keeping the team aware of progress (and changes that need to be made as well).