I've had mine since February and I'm liking it, although I'm thinking about upgrading sometime next year after PMA (early March). Depending on what the K30 is like, it'll be between it and the K20. If nothing else, I'll be able to score a great deal on the K20.
I'm also curious to see what happens at Photokina, as I'm hoping that Pentax will introduce a smaller lighter body that'll do most of the stuff that the K10 will do. If I were to get something like this, it would be a second body, not a replacement for the K10.
In the meantime, I'll be saving the money and fattening up my rather skinny savings account, so when it does come time to make a decision, I'll be ready to buy.
I hope the buying activity in the marketplace picks up by next spring, so I won't have to put my K10 on Fleabay should I decide to sell it.
Heather