Allegheny County Cemeteries
Allegheny County GenWeb Project collection of online resources for genealogy researchers
Allegheny County Message Board read and post messages with other genealogy researchers of this county
Allegheney County, PA - at the American Local History Network Site useful links to genealogy records
Allegheny County, PA Genealogy Forum read and post messages about your ancestors for this county
Allegheny County Register of Wills
CensusLinks.com - online censuses for Allegheny Co.
Census-Online.com - census transcriptions for Adams County
Interment.net - cemeteries of  Allegheny Co.
US GenWeb Archives for Alleghenys County cemeteries, newspapers, wills, military rosters etc recorded online here
Vital Records - Order Birth, Marriage and Death Records Online how to obtain vital records online

Additional Resources

Pennsylvania Newspaper Search enter your ancestor's name to instantly search the world's largest newspaper archive; over 12 million newspaper pages
Pennsylvania Birth Records
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Pennsylvania Divorce Records
Pennsylvania Death Records