We have a rate of $129 at the Francis Marion hotel. Reservations in the room block must be made by July 9. It's a stellar rate at a really lovely place:
http://www.francismarionhotel.com/
Rooms include wifi, since I know that's your first question. :-)
If you know you'll be attending, please book as soon as possible so that if we run out of rooms, I can secure more. This is an amazing price for downtown Charleston, so we'll want to move fast if we need more space.
Thanks!
Ruth