6/8MHz channel bandwidth seems quite wide compare to their carrier frequency. Is that OFDM for throughput, or spectrum spreading for CDMA? Neul website does not show technical detail such as modulation method...
WiFi uses 20MHz channel bandwidth at 2.4GHz, so BW/carrier ratio is approximately the same for both cases. It should not cause any significant difficulties. Choice of CDMA versus OFDMA is a long-running dispute and depends on many factors.
It is great to see silicon in the field that can demonstrate Weightless in action. A low cost, m2m communication system is a key piece of the IoT explosion that is on the verge of happening. This is the first stop towards a sub-$2 radio module that has a 10 year battery life and a 10km range. The future is bright.
But Neul originally said they would leave it up to others to make the chips. I think Neul expected to make their money taking a few nanocents for each byte of data that gets transmitted and for administering the dynamic databases of available frequencies.
However, it looks like they need to make the chips as well, at last to encourage others to get involved?