Dare Dreamer Magazine has an article on using compound clips instead of projects to make new sequences, since new projects take up a lot more hard drive space.
Sounds interesting, though it does just further highlight the continued issues with FCP X. Not being able to share renders between Projects (which are sequences in FXP X) seems ridiculous, and not very power user friendly.
Still just can’t see myself every trying FCP X again, not when Premiere Pro CS6 and AVID Media Composer are out there.