Well, statistics teaches us that randomly clicking octo explorer transactions will likely show the wallet with the currently highest hashrate.
it's this one:
http://explorer.octocoin.org/address/8NQcJrZgyqJYiNXUuXtbQXn3AKufTSXqmTbut, the octo explorer somehow doen't show it
EDIT:
if anyone has some spare time he could try to trace back this address. if it leads to the first days/weeks it is likely the devs wallet and it means they are still mining with lots of hashrate.
That address is most likely a pool address, as seen here in the link to FusionHash's wallet address.
http://explorer.octocoin.org/address/8dWMopM6t8exAvGc7PQUEtrHdBwgTnktJbIt could be Edric's pool address, it could be a multipool (although i don't think any multis mine octo anymore), or it may be someone solomining (most likely)
speculation leads to no good here at this point so take that as you will

Finally, before people come on here and start spouting conspiracy theories (I'm not just talking about you, Thompson); maybe they should take some time and do a little research by reading through the entire thread. The issue of addresses mining tons of Octo has been brought up many times and there are several posts that tell the addresses' source.