I know we have not heard about potential new kit, Pentax are following Canon's lead.
I spoke to a major camera seller here in the UK about this very subject a few weeks ago (Warehouse Express in case you are interested). Anyway, it is Canon's philosophy to ensure that any new releases are kept schtum. When a product is ready to release (for instance the recent 50D), the contact their reps to get to the office for midnight on a given day, with no other information apart from that. Then and only then, will they announce the new product to the reps, at the same time as releasing the press release to the world. As with the 50D, the press and the reps were caught off guard with the product.
Nikon appear to now doing the same (D90), and i am now sure that Pentax are doing the same. This is to ensure that no leaks are forthcoming prior to annoucing to the world.
I will presume that Pentax will do this just prior to Photokina, and announce the day before the show, of the new kit that is coming out.
However, it is nice to speculate on what is coming out though