According to Xbox 360 magazine, the Sony-owned PSP Connect site has a large banner add promising a Gran Turismo HD video preview.
The only problem is that the banner uses a screenshot from Microsoft's Project Gotham Racing 3. It is not an accidental banner being placed in the wrong place either, someone has scrawled PS3 promotional guff all over the image.
The banner was provided by the marketing service MediaSpigot and was not packaged by SCE or Sony.
More here, with side by side picture goodness. µ