They say that necessity is the mother of invention, but personally I'd nominate frustration instead. Lots of the time, the things you need to do, or think you need to do (get more exercise, pay your taxes) get pushed off or procrastinated into irrelevancy, but the things that frustrate you -- even if they're below the radar -- will drive you to the point of saying "I'm going to fix this @!#*& problem no matter what it takes!" Inventions motivated by frustration tend to be quick hacks that provide at least a momentary sense of achievement, if nothing more.
If I wasn't deeply frustrated with the QuickTime Pro feature that lets you quickly email a movie, but only if you use Mail.app as your email client, I wouldn't have spent the time and energy to whomp up this Applescript. Entourage users can throw it into the Entourage script menu, or stash it in a quick-run location or under a hotkey if you want. All it does is export the frontmost movie from QuickTime Player (standard or Pro), then it encloses the exported file in a new Entourage email. Nothing too fancy, minimal error checking, and it will not respect odd/widescreen aspect ratios... but it does seem to work. If you are recording quick video clips with your iSight and emailing them off, or doing mini-screencasts, this may be something that finds a home on your machine. Download it here.
Please note that the script is placed in the public domain, in readable form, and is provided with NO WARRANTY WHATSOEVER. Use at your own risk. Any ill consequences to you, your computer, your videos, your sanity or your interactions with friends & family who are now bombarded with your video snippets are your own problem and in no way the responsibility of me, TUAW, Weblogs, Inc. or AOL. In case of a water landing, your seat cushion serves as a flotation device. Exits are under the lighted signs. Do not meddle in the affairs of wizards, for it makes them soggy and hard to light.