This post may not be worth anything, but here is the info I got from a Pronto Team rep at CES in January.

He said Philips dropped the iPronto because its lead content was too high to meet EEC requirements. He intimated that a replacement product would be announced at CEDIA 2006 (Sep-Oct), but would not provide any information. So whatever it is (or isn't), it may or may not be able to use existing iPronto programming.

I am skeptical, because at the 2005 CES, Philips told me that there would be exciting new announcements at the 9/05 CEDIA, and what we got was the 3500/6500/7500, mere upgrades of existing products.