Not sure when it happened but Microsoft has updated their "Buy" section of the Windows Phone website. The Nokia Lumia 710 and 800 are now listed along with the Samsung Focus, HTC Arrive and other First and Second Generation Windows Phones.
Along with the general information the individual listings also have "check price" links for the various countries the phones are heading to. So far all you can do is submit your email to be notified when the new phones become available but it's a start.
Oh...one nice thing about having most of the Windows Phones listed on the Windows Phone site is the ability to compare models side by side. You can check and see how the Lumia 710, Samsung Focus Flash and HTC Radar compare to see which one to set your sights on.
Thanks goes out to Nataku4ca for the tip!