If you cant find the thread you can find about 150,000,000 hits on the term 'credit report' using google. There is a ton of info out on the web, but there are a few basic things folks need to know...
You can get your credit report for free once a year, or anytime immediately following a rejected application for credit. A credit score (FICO) is a rating based on your credit report and a host of other attributes that fall into various categories.
3 companies produce the industry accepted credit reports; Experian, Equifax, and Transunion. (I think one of them is called Providian now, not sure, the names keep changing among the three)
1 Company Fair, Isaac (FICO) developed the credit score formula that determines a FICO Score.
Most credit card companies have programs that will provide both you report and score, and you can typically get this for free during a trial period. Aside from monitoring programs, most people should never need to pay to find out what their score is or what their report contains.
There is a lot more to it than this, but I am not the authority so I will leave to those that consider themself one. Just do some research...its a fairly simple concept, however Orwellian it may be.
Now what I would like to see is, someone that works as an actuary for one of those companies to post a thread here about the technical components of the score calculation. There are a million lists of things a person can do to improve their score, and yet more lists about act that hurt a score, but what I would love to see is the actual formula used to calculate the score...that seems to be a secret as I have yet to ever see a technical breakdown of the exact components and how they are weighted.
Good luck finding information, and be wary of sources...your credit history is nothing to chance.