I interviewed a few top internet companies (where I didn't get hired...) and I learned that they had downloaded my CPAN stuff to examine. They had meetings about it.

My advice would be to do a little hobby programming to show off your style and skill. Put that on CPAN.

Even if it's not of the same scope and caliber of your closed source work, it will give them an idea. Most likely you will have learned things, in a generalized sense, that you can share with others -- who might then benefit from your showing off.