For more information, see "Otakon draws people together," By SALLY NEWLIN, Herald-Mail August 5 2008.
I've lifted the relevant physical info from the end of the article:
9 a.m. Friday, Aug. 8, to 2 a.m. Saturday, Aug. 9, and 9 a.m. to 3 p.m. Sunday, Aug.10
Baltimore Convention Center, 1 W. Pratt St., Baltimore
$65 each day for Friday and Saturday; $25 for Sunday
Visit www.otakon.com for more information and for a complete schedule.