In the past few days I've been able to squeeze a few hours out of my schedule to play with various visualization tools. I've tried Plot.ly, and I loved it. I hope that the developers behind this tool will keep improving it in the future. Those of us who would want to code just to create silly video games will be very thankful. Next on my list: Lyra and Graf.ly.
UPDATE: Plot.ly's Matt Sundquist has just told me that they are developing a ggplot2 wrapper. Here's a walk through.
(In case you're curious about the screenshots below, they are related to a little project that involves exploring the quality and attainment levels of public schools in Miami-Dade county. Let's see what I can come up with.)