I preordered as well and am super psyched to get it. However, I don't see anything that says it is now available. Because it was scheduled to be released today the *Coming Soon* on the storefront automatically went down(as it has done on the 2 prior release dates.) I checked this morning at 7am(so that would be 4am Tracy's time) and it no longer had the *Coming Soon* on the storefront page but when you click on it, it does still say Coming Soon.
I'm certainly still hopeful that it will be released today but I don't see anything different to make me think that it's available right now. This has happened with every other scheduled release date for the e-book.
ETA: Actually maybe I should ask how you know it's available? Is there something that I'm not seeing or did you get an email from Tracy or something? Thanks!