I see Gevlon is ganking in Gamis now. That makes me happy, my main competition in Derelik is based out of Gamis. Usually Derelik is a slow, sleepy region where you don't have to worry much about gankers. Hopefully he'll get a trade hauler or two on top of the miners.
For anyone thinking of helping Gevlon's little project I'd suggest ganking in Jarizza too. Might as well knock off the only other noticeable competition in the region while you're at it.
But stay away from Tanoo, there's absolutely nothing interesting going on there. And whatever you do don't harass any Vigils or Prowlers you happen to notice flying around the area.
Gamis is a mining center and Jarizza is a manufacturing center. While I'm not positive, I presume they're both mission hubs too. Tanoo is where I'm based out of, I choose it because it's a travel chokepoint on the route to both Rens (4 jumps away) and Devoid Region (one of the few hi sec regions I don't have a trader in).
All 3 are hi sec trade hubs, fairly central in the region and have clone and repair facilities. Jarizza has factories too.