Michael sent us an email over the weekend. He told us that he was inspired by the article about Standard Hotel's floor of pennies and decided to do his apartment countertop in the same unusual "material".
Michael sent us the link to his post all about the project at Artifacture Studios - here are some of the pertinent details on the penny project:
Since we had played with two part resins in the past, it wasn't a big step to come up with the idea of covering the bulk of our counter space in pennies. The whole process probably took 6-8 hours spread out over about a week. Most of the interstitial time was just waiting for the various parts to dry, or cure. The whole process took about $77.00 in pennies, and the total cost worked out to about $7.50/sq ft.
Michael also pointed us in the direction of the complete DIY instructions which are posted at Make:Projects.