DConf 2016, Berlin: Call for Submissions is now open!

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On Thursday, 29 October 2015 at 08:41:53 UTC, Iain Buclaw wrote:
>
> I think simplicity works better for a logo, moving any small 
> details into the background.  Using this kind of tactic I think 
> works well - for instance, a lot of people still wear their 
> DConf 2012 shirts on a weekly basis.

What do these shirts look like?