I'm in Philly:
94.1 WYSP - rock (70's to today), Stern in the morning
93.3 WMMR - rock (70's to today, more focus on today's stuff)
100.3 WPLY - tilts towards "modern rock" (not really "alternative", though), mostly stuff from the mid-90's to today
102.9 WMGK - "classic rock", 60's & 70's mostly (Beatles, Stones, etc.)
610 WIP - AM sports station
660 WFAN - New York's AM sports station