Parallax is in the process of designing its next gen Propeller chip. Informally dubbed the Propeller 2, the design includes a 32-bit, general purpose multi-core microcontroller with 8 identical cogs, a 160 MHz planned maximum clock speed, core voltage 1.8 VDC with I/O pin voltage of 1.8 VDC–3.3 VDC, 92 I/O pins total with each pin planned to have internal input ADC, output DAC, true or inverted input/output, differential input/output, comparator and Schmitt input.
Parallax is inviting comment specifically regarding the code authentication scheme to be used in the Propeller 2. They have published this draft document and are seeking input on the Parallax Forum from those interested.
UPDATED: Check out the Propeller 2 specs page for the complete preliminary feature list.