This weekend I looked through the Sagrada Mitra de Guadalajara (which 
by the way is an incredible resource that everyone should look at if 
you have traced your lineages going back as far as the 1700s) and made 
a couple of breakthroughs.  These have taken my research to some new 
towns, namely Mazapil, Zacatecas and Jerez (most likely the area around 
Monte Escobedo) and I would like to find out who is doing research in 
these places and any hints that would be useful.

The breakthroughs are as follows:

Juan Antonio ARANZAZU was born in 1696 in Mazapil, Zacatecas, 
illegitimate son of Captain Antonio DE LA BARREDA and Isabel DE PIERO.  
He later moved to Guadalajara, where he was raised and schooled by Sr. 
Doctor Don Joseph DE MIRANDA VILLAYZAN of the Consejo de su Majestad, 
Oidor de la Real Audiencia de Nueva Galicia.

(Juan) Joseph PINEDO GAMBOA was most likely born in Monte Escobedo and 
baptized in Jerez circa 1700 (though I can't find his baptismal record 
in VRI... looks like some years are missing), son of Lorenso PINEDO and 
Josepha GAMBOA.  He later moved to Juanacatic, Totatiche, Jalisco and 
he and his sons continued to marry into families from Monte Escobedo 
(ROMERO and ROJAS)