While quite a few people thought it would never happen, EA made good on its word and has just released a de-authorization tool for Spore. While the five installation limit is still in place, the tool allows you to deauthorize one of your copies to free up one of your five slots.
Unfortunately, the tool is currently only available for PC, so all you hipsters running around with different color Macbooks for each day of the week are out of luck.
While it's nice to see that EA is slowly learning that DRM doesn't work, we can hope that eventually they will abandon install limits altogether. Although, considering how many copies of Spore were pirated, it's easy to see why companies and executives have a knee-jerk reaction to shove restrictions into all their games.
The tool is available now and can be downloaded from the offical Spore Web site.