Updated Monday morning
Pittsburgh Post-Gazette Episcopal diocese chooses to secede by Ann Rodgers
Pittsburgh Tribune-Review Episcopal diocese votes to split by Brian Bowling
New York Times Pittsburgh Episcopal Diocese Votes for Split by Sean D Hamill
Agence France-Presse US diocese splits from Episcopal Church amid gay crisis
The glossy brochure mentioned in some reports can be seen as a PDF file here.
Monday morning update
A further report in the New York Times by Sean D Hamill After Theological Split, a Clash Over Church Assets