Hunt the ghost, scan the probe, disable the artifact - those standard 'star cluster' missions. Can we get ahold of those as 'templates'? They are short 5 min missions that run in a big circle, and I think that as a starting template for UGC that people will be able to flex their skills a bit better by having something to manipulate that allready works. And who knows, perhaps some UGC will totaly replace what is sadly allready there.
EDIT: Why do I even bother, I should know by now that an idea presented by a disabled person has no merit in some peoples eyes untill it is rephrased by a non-disabled man. The 'Templates' thread is much better than mine.
No one's really intending to "dis" you. The template thread was for creating and sharing boards. You're asking for missions to be created and shared...which probably will happen in some form. If you look over at the UGC website Kirkfat and AtomicFB started, you can see that they will have posts on what you're looking for.