Ask HN: Let's Revive PG's /ideas.html discussion

Since the discussion for PG's ycombinator.com/ideas.html seems to have gone stale (and possibly out-dated) lets get a new discussion going.

There are also a lot of "What do you want built.." posts, so lets consolidate.

Answer any of the following questions:

1) What needs in your life do you wish were fulfilled online?

2) What online sites do you admire and how could you see a similar concept working in lateral industries?

3) What offline sectors do you see as the least represented online?

4) And then to go back to the original ycombinator.com/ideas.htm - feel free to elaborate or add to the list. (in the same vein, generally speaking)