This isn't an attempt or encouragement to stack the poll for Pentax, by the way. Don't think that helps anyone. But the "quick poll" on dpreview.com right now asks "Update: NOW what's the most exciting Photokina product?". There's almost 25,000 votes, and the K-5 has 11% of them.
Several of the other entries — namely the Fujifilm X100 and Sigma SD1 — are genuinely exciting, while the Nikon D7000 is at least something new for that brand. It's not surprising to see the uninspiring Canon 60D get very little, and same with the sensible-evolutionary-step Panasonic DMC-GH2.
But given that the K-5 is also a sensible-evolutionary-step sort of model, it's very interesting to see it get so much attention. I mean, it's even almost beating "Nope, still nothing to excite me."