Market research on PPC search engines

[Metabid]

hi everyone, this is my first post. I hope that it is welcomed in this forum. I am trying to gather some market research on PPC search engines. I have a list of questions that i was hoping to get anwsered:

1) what are the key forums to be a part of?
2) what are the key books, email lists and trade publications to read?
3) what new technologies are impacting this industry?
4) who are the biggest players in the market?
5) Are there any untapped opportunities in the marketplace
6) what factors in this industry present the biggest challenges?
7) what governmental agencies regulate this industry?
8) What is the Stardard Industrial Classification (SIC) code for PPC search engines?
9) what is the sales treands($) growth rates? #'s of PPC search engine? why is the # of competitors increasing?
10) where can i go to find out more information about industy stats, etc.(please be specific)

[redzone]

metabid,

Rather than just ask a "slew" of questions, why don't you spend a week reading the "thousands" of relevant posts here on the topics, then any questions you still have unanswered, ask at that time...