The keywords are from major search queries, not sure if they're the most used keywords. It could be since Facebook has been taking over the social networking market. You CAN build a base around these keywords.
It's from a sampling of just over 700,000 search terms taken from the keyword tool. Right now I've got about 800,000 in there and I'm adding the result counts and whether any article directories or web2.0 sites make it in the top 10.
The number 1 serch was facebook. Then in your top 10 terms related to computers and the internet facebook is number 8. How do you work that one out?
None of these lists that get put out are the real deal. My database is really geared more towards commercial terms, but I was able to mine a list of the REAL ones before by messing around with some API calls in google to remove any industry information but I don't have that anymore. It wasn't all that useful. When google or lycos puts out a list it has more to do with trends than actual hard data and there's lots of cleaning up and cherrypicking.