@Hmac
No, it's just that they aren't sold in Walmart and Shopko; you can only get them from dedicated photography retailers. Canon and Nikon are #1 and #2 (sales wise) because they sell an XTi or D40 to every soccermom with too much money to blow on a point and shoot camera. Even though those DSLR's end up getting used exactly like a P&S and never see anything but the kit lens and "P" mode.
Pentax hasn't aimed a camera at the Professional market since the 90's when they had the "LX" which is still considered by many to be the best 35 mm camera of it's time. Since then they have marketed to the enthusiast segment with products that are professional quality but midlevel price. They aren't going anywhere, but don't count on them mass-marketing or opening up a pocket calculator division any time soon!
SLC
I agree, Pentax' marketing plan is baffling, and apparently not working very well for them. Clearly they don't have the resources to address the market in a financially sound way. That's not so good for their long-term outlook. Olympus was in far better shape financially when they decided to dump their entire line of film SLRs and lenses, and concentrate only on the broader point-and-shoot market. I think it's pretty clear that they're on the bubble.
If Pentax made a better camera than Nikon or Canon, I could see taking a chance. But...they don't.