That's the title of a new post at Origami Blog where has been officially released the MS Reader optimized for Tablet PCs and Origamis:
Hi! I'm Christine from the Microsoft Reader team. Some of you may know me from some of the other device forums like PocketPCThoughts, Aximsite or the Microsoft.Public.Reader newsgroup under the name MSReadergirl.
I know that many of you have been waiting for a long time for this download and we apologize for the wait but we hope you'll think it is worth it.
This new release can be downloaded here.