Hm... Eskarina: I seem to remember PTerry himself said at one point that he wasn't planning on make her appear again.

Spoilers for "Mort" and later Death Books :

[quote:e985b2b5fe][size=9:e985b2b5fe] [color=white:e985b2b5fe]Seeing how much time passed on the Discworld (except in Lancre, where they jumped over a few years) she should be in her mid forties by "now" (assuming that she was in her late teens at the end of Equal Rites, and seeing the next book was "Mort" and how, by "now", the offspring of Mort and Ysabel is grown up Susan). So well never see young Esk from Equal Rites again, except she got lost in a dungeon dimension.[/color:e985b2b5fe]

[/size:e985b2b5fe][/quote:e985b2b5fe]
A cameo would be interesting...

And Agnes... I suppose she was to fill the gap Magrat left. I -again- seem to remember Nanny Ogg and Mistress Weatherwax talking about the fact that Magrat was now busy Queening and all, plus being a mother. (It was more the Queening, though, it seems, being a mother didn't stop Nanny after all.)