Some manufacturers already have data sheets on their WWW sites. I plan to add links to those data sheets whenever possible and hopefully with the cooperation of more of the manufacturers or volunteers.
Some chips have pinout information within the chipdir .
When all this fails, locate the WWW site of the manufacturer. You can also look in the back of any of their data books. Some distributors also deliver world wide or are even specialized in mail-order, so you can also contact them. When you're looking for a serious amount of scarce chips click this.