I had started these guys nearly a year ago after I first saw Tristyn's Random Humanoid Generator. I meant to finish this a lot sooner, and I think it's pretty much been finished. The result I got really got my mind spinning. I can't recommend this generator enough. It's really an excellent resource for making some new monsters.
I had initially written these monsters back when I was running LotFP. Since then I've started looking at S&W as something of a more default system, so I've tried to adjust them to this. That said, I believe morale is essential, so I've added that as well. I also have the stats for these friendly web-spinners as generic as possible OSR stats.
I figure that Webbers are most often preying on other monsters, so it might be profitable for PCs to attempt to make some kind of deal with their Queens (or the Low Mothers at an outpost). I envision Webbers as having a Neutral alignment, or perhaps Lawful given their propensity for strict hierarchies (I suppose it depends on how you want to define alignments). It is very easy, nonetheless, to picture a colony of Webbers as a Chaotic incursion, and power-hungry Queens no doubt would seek deals with demons or other Chaotic entities. I picture these guys mostly in wooded areas, generally attempting to expand caverns or create extensive burrows in the soil.