i was thinking that there were only 3 published etherdongle pixelnet firmwares, rather than 4 - e1.31 universes 1-32, 33-64, and 65-96 - which match the first three Chrisatpsu described. The conductor version need only address the first 4 pixelnet universes (e1.31 1-32, or addresses 1-16384, however you prefer to refer to it). each conductor/slave can have its own independent block of 4 universes - your software will need to be able to map the higher addresses to the appropriate sequence file.
the ether dongle in any configuration is only capable of putting out one type of data. It's either all pixelnet or all dmx. The actvie hub has a pixelnet to dmx converter that mirrors one of the eight 512 blocks of channels to a dmx output. At this time, there are no stand alone pixelnet to dmx converters.
The DMX conductor firmware is on the list for development, but the slave software is higher on the list...
RM