I keep finding conflicting answers on this... According to some forum posts it will not be open-source, but at the same time cgracey keeps posting the P2 verilog source in this forum.
I think a copyleft license would make the most business-sense for parallax right now, since the source is already available in these forums and copylefting would force anyone trying to reuse the prop2 IP to open-source their resulting design as well. Perhaps include a BSD-style option (with a fee) for IP licensing to closed-source applications?
I myself don't mind so long as the source is available in some form for private individuals, but copylefting would both keep it open-source and prevent reuse by competitors.