Interesting bits from the Taptu Whitepaper: Making Search Social (PDF) which was sent to me by Stefan Keller. I haven't found yet a place where one can download it easily.

Making Search Social by Taptu

There are four key megatrends that are combining to create the New
Wireless Ecosystem:

• Ubiquitous mass storage + processing power on handsets
• From mobile narrowband to mobile broadband communication
• A revolution in mobile UI
• From walled garden operator portals to open gardens
  

[...] Some observations about Generation Y (born 1977-2000):
In contrast to ultra-individualist X-ers, Millennials are grouporiented
-- meaning that they are less interested in an "army of one"
and more interested in the "watch me become we" alternative.
Group-oriented concepts such as "leave no one behind" may
emerge from the movies (2002 movies Lilo and Stich and Black
Hawk Down both used this phrase) and go mainstream.
(Note from me: This permeates japanese mangas, films and culture. Has this to do with the anime and manga culture Generation Y grew up? Would be an interesting research object for itself.)

[...] The nature of search in this new world
of mobile Internet devices will shift. This is because the journey that
Generation Y is taking on the Internet is more concerned with social
expression than finding information.

[...] There are four key aspects of “mobile search made social” which we will
review in the next four sections of this White Paper:
1. Social-assisted relevancy scoring
2. Easy sharing of search results
3. Human editing of search results
4. Crawling and indexing social info

[...] Social-assisted relevancy scoring
Level 1: Relevancy in general – what the world thinks is important
Level 2: Relevancy in your friends group – what your friends think is
important
A mobile search engine that operates at Level 2 requires a search engine
that can access your social graph and boost the ranking of search results
that your friends have deemed to be important. It would preferentially
show results that were more fun and more relevant to you in your social
context. For Generation Y, this would be a significant benefit.

See also:
Mobile Context by CEOrtiz