We've not heard any reports of power outages affecting Baltimore-area craft breweries, save for one brewer who shamelessly admitted he might as well stay at work brewing because the power was still out at his place), but we know that's not universally the case. Communications interruptions--cell phone signals still out, internet connections still down--are affecting beer salesmen and liquor stores in the region, and many customers are still without power, stopping in to bars to recharge cell phones, check e-mails on wi-fi, and have a pint while they're at it.
Harbor East, Fells Point, and some downtown venues reported a brisk weekend business; apparently Washingtonians without power flocked to Baltimore hotels to wait out the power outages (must be nice to have the money to drop on an impromptu weekend getaway, huh, folks?), and patronized local bars and restaurants.
The Washington Post, on the other hand, just posted this video covering a frantic, and down-to-the-wire, effort by Alexandria, Va.'s Port City Brewing to rig up an emergency generator to "save the ales" from overheated fermentation: