PostGIS topology full story

Dear list members
does someone know where I can read the full story of PostGIS topology ?

I am interested in knowing:
- who developed it and when this development started
- which have been the mayor releases and improvements during the years
- which are the users that are using the topology for working with tables
with millions of rows (I am asking this because I have read, but I do not
remember where, that PostGIS topology is very slow and appropriate only for
small datasets).

Antonio