Don't pass by the scads of info on the net about PA genealogy! It's easy to think it is not in your search league, but look again: Many sites offer you county specific info, have message boards and mailing lists, and allow you to do surname queries (last name look-ups). 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.
PA County Youth Agencies (check here if the adoption was "through the county")
GENWEB - Genealogy Web Sites for PA Counties
Genealogical Society of Pennsylvania
Historical Society of Pennsylvania
Genealogy's Most Wanted Adoption Section
CityDirectoryLookup.com - See if Johnny has the directory you're looking for, for a free lookup!
Cyndi's List - PA (great links and many mailing lists)
Genealogical Computing Society of PA
PA Sites at Rootsweb (lots of county info)
PAGenWeb: Pennsylvania Mailing Lists (many by county) Genealogy mailing lists
RootsWeb Surname List - Interactive Search (last name search)
Paid legwork by county to consider
More volunteer and paid legwork for PA
A PA link list from "Dear Myrtle", the AOL genealogy guru
Eastern Pennsylvania Obituaries
Ancestry Genealogy Message Boards
Eastern PA Genealogy Message Board
Berks Co, PA Genealogy Message Board
Bucks Co, PA Genealogy Message Board
Carbon Co, PA Genealogy Message Board
Columbia Co, PA Genealogy Message Board
Dauphin Co, PA Genealogy Message Board
Lebanon Co, PA Genealogy Message Board
Lehigh Co, PA Genealogy Message Board
Luzerne Co, PA Genealogy Message Board
Montgomery Co, PA Genealogy Message Board
Montour Co, PA Genealogy Message Board
Northampton Co, PA Genealogy Message Board
Northumberland Co, PA Genealogy Message Board
Schuylkill Co, PA Genealogy Message Board
Northampton, Carbon & Monroe County, PA records
House of Reps Democratic Caucus
House of Reps Republican Caucus
Find Your Republican Representative (yes, you'll find Krebs, the UAA sponsor [HB 654] here)