Many pages also offer legwork in a given area, some free, some for a fee.
Most people in the genealogy sector have been very helpful to adoption searches and understand that it's tough to do your family tree with sealed records. Depending on the info you have, you could find some really good sources here. 1997-1999 Click for disclaimer and additional copyright information. People checking out genealogical and historical info on PA have numbered since August 20, 1999.