I'll just toss in this makeshift idea I've started using, that seems to be working quite well (with one advy, in one fairly active realm)
Since there aren't always other advies around, I send reports to the region lord, and RP a few lines while I'm at it about the problems he's having, what a wonderful guy I am for dealing with them, etc. Get's a little more interaction going, and unless you're in a rogue region, there's always someone it makes sense to send the link to (even though they can't use it)
I also send Investigation reports so I can remember later what to go after. Obviously you don't want to spam any one lord, but gives an additional way to handle this problem & boosts RP