Search Engine Challenges

Hi guys,
I want to know about some history about SEO.
Give some information about the origin of seo.
In which year which Domain done the first seo work by which company.

Hi, I remember finding out about this site when reading about their migration from Vbulletin to Drupal, and also the Vbulletintodrupal module over in the Drupal.org site.

I was wondering what people have experienced in terms of the difference to their traffic by migrating over to Drupal.

I have a large board with almost 100,000 members and 500,000 posts. I do not use VBSeo.

Link Wheel is the new task in the SEO? Anybody suggest me the correct process to do link wheeling for my educational site.

Previously link baiting is one of the great factor of seo for attracting visitors. I wanted to know that still Link Baiting is working? can any one tell me that how many types of link baiting are there?
Looking for your valuable comment....

What are the important factors that play the major role to increase the PR of a site?

Can any body tell me that "what is the difference between Yahoo algorithm and Google algorithm and on which common factors i should concentrate for getting good position in both search engines?"

What the ranking factors considered for SEO in 2012?

Now a days article spinning is not working for me for building links after Google Panda update , kindly update me on this.

I performed social Bookmarking for some of my website and didn't receive any advantage in increasing ranks for the targeted keywords.Did any one of you got results via this technique.