While Sprint has not yet uploaded the update to their servers, PhoneNews.com has the final version of the Windows Mobile 6.1 upgrade for the HTC Mogul.
This update also adds, as previously reported, Sprint TV service to the Mogul. Previously, Sprint TV service was available on the HTC Touch, but not on the Mogul. This makes Mogul the first PDA Phone on Sprint to offer both Sprint Navigator, as well as Sprint TV, in a single device.
Verizon Wireless and Alltel have yet to commit to upgrading their variants of the HTC Mogul (the XV6800 and PPC-6800, respectively), to Windows Mobile 6.1.