Via Boing Boing comes this uncouth approach to developmental performance enhancing. From the HeadLine Shirts description:

It started harmlessly in the 60s. Groups of engineers would grow their own binary data feeds for recreational use. That was followed by use of the occasional punch card or mainframe. But pretty soon, hardcore users could no longer get the throughput – or “fix” – they were chasing.

You can get yours for $24 from Headline Shirts.