30 start-up ideas

YCombinator founder Paul Graham writes about 30 ideas that they are ready to invest. More precisely, it describes 30 market pain, obvious needs / problems that exist on the web. Among these areas are:
other distribution of music (who will kill record labels?)
simple browsers
new news (simpler, shorter, brighter, more accurate)
photo and video file sharing
auctions
other advertising (desired by the user and measurable for the customer)
online training
new payment methods
the best craiglist (or Yandex.Market in Russian for services)
best video chat
simplifying mail handling (Xobni is just one of many)
and finally, a startup for startups (sell jeans and spades for those who are looking for gold)

America did not open. It proposes to make uncomfortable convenient, long fast, and difficult simple.
The same trends are visible in runet, many of the startups that we are looking at are aimed at these areas. Who is first?