And now it looks like the HD7 is on "backorder" as well (see Samsung Focus). According to TmoNews, when you try to place an order through Tmobile's website, you get the above message. A quick call to customer care results in the same message with the caveat that they don't know when it will be back in stock.
For now at least, you can still get it through Amazon Wireless, which being $50 less is a better deal anyways. Although funny thing, my HD7 order still hasn't shipped from Amazon, so who knows what's up.
Get the Windows Central Newsletter
All the latest news, reviews, and guides for Windows and Xbox diehards.
Daniel Rubino is the Editor-in-chief of Windows Central, head reviewer, podcast co-host, and analyst. He has been covering Microsoft since 2007 when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, laptops, next-gen computing, and for some reason, watches. Before all this tech stuff, he worked on a Ph.D. in linguistics, watched people sleep (for medical purposes!), and ran the projectors at movie theaters because it was fun.