Arts editor or features editor 

Philadelphia Inquirer
Wilmington News-Journal
Delaware County Times
(Weekly Delaware County paper)
Chester County paper?
Ceicil Whig
Philadelphia Weekly
City Paper
Spark
Out and About

Philadelphia Magazine
Main Line Today
Delaware Today
(Baltimore Today?)
(any other local magazines)

*Art Matters (Philadelphia edition)

American Artist
Art News
The Artist's Magazine
Art and Antiques
*American Art Collector

any other magazines that seem relevant for a press release about the launch of an artist's web site

places to look:
Libraries (Swarthmore and Ridley have more periodicals than Furness)
Borders
online