Dan Simmons' 'Ilium' and 'Olympos': Any more books after Olympos?

Anybody know if Simmons is planning any more books in the ‘Ilium’ universe after Olympos?

To answer my own question:

http://www.locusmag.com/2002/Issue10/Simmons.html

“I don’t think it will grow into four books like Hyperion, but who
knows? I’m contracted for two. But at least if it grows into four
books, I know what the model for the other two books would be. People
have said Ilium and Olympos are based on The Iliad and The Odyssey. But
they’re not. Ilium and Olympos are both based on The Iliad themes. So
if I do two more, I know where I’m going for inspiration." – Dan
Simmons