Photo Romors has published such a letter which is "just in", see:-
http://photorumors.com/2011/07/01/open-letter-from-hoya-to-valued-pentax-customers-and-partners/
I think the two most important messages as it looks are: 1. "All employees will be transferred to the new company accordingly."; 2. "Also, all current products will continue to be sold with the PENTAX brand name under current operations.".
But do note about the wording of "current product" of the latter! Do you think there is any hidden meaning/hint btw?
Related:-
Hoya Selling Pentax Camera Division and Businesses to Ricoh