Just got an email this morning from Alaska saying you can now use miles to book hotel rooms... appears to be powered by rocketmiles. This is a new feature, because as previous members noted in the thread in response to OP, you could not use AS miles for hotels.
What an interesting coincidence this thread. Here is the website for mileageplan hotels
https://www.mileageplanhotels.com
Here is the language from AS in my email message:"It's here: a completely new way to use your miles. Introducing Mileage Plan Hotels. Now, you can redeem Mileage Plan™ miles for free or discounted nights at 400,000+ hotels worldwide. Plus, you can book rooms for fewer miles exclusively as an Alaska Airlines VisaŽ cardholder.It's the only card you need to fly, or stay, just about anywhere."