On synthogy.com:

Ivory 1.5 for Mac/PC available in October 2005!

Development has completed for Ivory 1.5 for Mac/PC, and product will soon be at your local dealer. Please contact our distributor, ILIO, for information about availability.

In addition to cross platform compatibility with PC formats VST and RTAS, Ivory 1.5 features a newly revised 40 GB Library. Each piano has been enhanced with 2 additional velocity layers, and the entire Library has been improved with proprietary noise reduction for even greater fidelity. Upgrades are also available for all current Ivory owners. You may contact ILIO for further details.

I'm looking forward to the release, but I sincerely hope my good old Powerbook will handle it. It has extra layers, that means extra load...