I've seen three fc2 freebies that were explicitly named for the real people they were made to resemble (either here or at 3D Commune): Michael (Jackson), W (the President), and the Rock.  This is what led me to believe it was OK to do stuff like this.

The difference in my case may be that I want to name my freebies after the characters instead of the actors.  Do you think I've diagnosed that correctly?