We've negotiated a block of discount hotel rooms for State of the Map US attendees at The Washington Plaza Hotel, which is located just five blocks from the conference center.
Hotel rates are $139/night for a single queen bed, and $159/night for two double beds. If you're interested in a roommate, post about it in the wiki. These rates are available from Friday, April 11 through Sunday April 13, and must be reserved by Tuesday, March 11th. You can book online here
We've also compiled a list of other recommended hotels within walking distance of the Washington Convention Center. State of the Map US is in DC during tourism season with the cherry blossoms set to bloom in April. So book now to get the best rates available!