Sovereign Press hope to have copies on sale at GenCon Indy, as well as advance copies of the War of the Lance Campaign sourcebook. All things going well, I'm thinking you'll see ToHS in stores 1st week of September and WotL in stores 1st week of October.
Both are absolutely gorgeous books, packed with both crunch for those who like that, and loads of detail and background for those who like that.
Cheers,
Cam