There is no official release...

[rmhale]

[from a Sprint Consultant]

There is no official release as of yet, any official release will be posted on http://america.htc.com/mogulupdate/ but there is an unofficial leaked ROM that includes things like WM6.1 and SprintTV. If you don't feel good about having to reinstall your programs twice, then I would wait for the official one to be released, mu uneducated guess would be thats its not too far off. But I am running the leaked image and it seems MUCH faster for the way that I use my device.

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Kevin
Retail Communications Consultant
Sprint Corporate Retail Store
HTC Mogul 6800 - Leaked 3.56 Semi-Official (GPS, Rev. A, SprintTV, WM 6.1). Soon to be a Samsung Instinct once available to employees.