Have you read the fanfiction the Wings of Wrath? It's a long one, but you might like it.
It's about Fang finding his reletives, and, well, thats the plot really, I don't want to spoil anything, but it's mostly just in-depth look at the relation ships between the characters.
I think it's the only fanfic I've ever bothered to read and finish.... (it is finished right? *shifty eyes* the author hasn't edited it?)
(I just got frustrated after the first millions failures I read... Some people really can't write. I don't know how I managed to miss all the decent FFics, just my bad luck I suppose, but I've never has the heart to write any of my own because of it...)