iMovie 08 kept crashing when I opened it. Here is the sollution:
iMovie Solution!
If you iMovie keeps crashing there is actually a very easy fix that took a lot of digging to find. Open your User folder in finder, and follow it to "Library" and then open "Preferences." Scroll down and find the following:
com.apple.iApps.plist
DELETE IT! Log-off (no need to shut down) and log back in, and your iMovie should work.
Post your results here so we can validate the solutions. Good luck!