BGR just posted an image gallery of a 10 inch HTC Android tablet, currently named the HTC Puccini. I recently "rediscovered" my HTC Flyer and have been using it more and more with the HTC Ereader app (powered by the Kobo bookstore), Evernote inking capability, and HTC Sense user interface. It is natural for HTC to move to the 10 inch form factor to compete with other Android tablets like the Motorola Xoom and Samsung Galaxy, but I personally find the 7 inch to be more compelling for mobile use with the iPad 2 ruling the 10 inch space.
The rumored 10 inch HTC Android tablet may have an 8-megapixel rear camera (I still don't understand why large tablets even need one of these), stereo speakers, 1.5 GHz processor, Honeycomb OS, HTC Sense, and a 4G LTE radio. HTC has not yet announced such a device and it remains to be seen if this will actually launch. I would love to hear how the HTC Flyer is doing in terms of sales since the success of that device may determine if this one gets released.