Ask HN: What do you want out of the next big social utility?

Hi, I am a bit over a year into developing 2 different sites I feel (hope) will fill in some gaps not covered by facebook/twitter/reddit/HN/craigslist and will make for a great way to communicate with each other. Now I'm looking for some input and would like to know:

What features do you think are missing from the big sites of today? How could features of one be combined with features of another to make it uber? What features are essential to have in the next great social utility?