Unless you've been living under a rock, by now you've heard about the case that is certain to keep the armchair lawyers busy for years to come: Oracle vs. Google. It's already been dissected elsewhere, but in a nutshell: Sun owned their GPL-licensed Java virtual machine, and various patents on it; Google wrote their own JVM for the Android platform, Dalvik; Oracle bought Sun; Oracle uses those patents to sue Google over their JVM; Hilarity ensues.
So what? How does that affect us, as PHP and Drupal developers? Well it doesn't... except indirectly via another product that Oracle bought as part of Sun: MySQL.
There has been some discussion recently, in IRC, issue queues, and blogs, about the Drupal 7 database API and its impact on supporting different database engines. While I am still trying to avoid large amounts of public distraction, especially when we're supposed to be trying to get a Drupal 6 beta 1 out the door, I feel it's important to get a few points cleared up lest they lead to confusion later.