^^^ LOL.... I think 1340 (WYCB) is the only AM station playing gospel in DC, but I'd have to ask my mom. Remember the jingle? "W YYYYYYYYY CCCC BBB - thirteen forty AAA MM!"
HOWEVER, they just launched an FM gospel station about a year ago:
http://www.praise1041.com/home.asp
I personally don't enjoy it very much because it's not old school enough -- I like choir/piano gospel, not soloist/rapper/dancers/chorale/harp/pan flute/drum line/dj on the ones and twos gospel.