Here are the MIDI files I already mentioned:

Tango Flamenco - an Andalusian dance written down by Vladimir Bobri

El Ultimo Beso - from Ecuador, written by Armando Martinez

Brazilian Song - written by Francisco Mignone

Tedesca - written in the 15th century by an unknown composer

Saltarello - written in the 16th century by Vincenzo Galilei (Galileo's father)

Italiana - an anonymous composer from the 16th century/p>

Song - another 16th century piece anonymously composed

Allegretto Moderato in D - written by Fernando Sor

Allegro Moderato in C - by Joseph Kuffner

Allegro in C - by Fernando Sor

Allegretto in C - also by Fernando Sor

Andante in C - by Fernando Sor

Andante in G - by... yes! Fernando Sor

Capriccio in C - a work by Ferdinando Carulli

Etude I - by Leo Brouwer

Etude V - by Leo Brouwer

Etude VI - also by Leo Brouwer

Invierno Porteno - by Astor Piazzolla

Moderato in C - by the ever popular... Fernando Sor

Moderato in C - by Sor, same name - different piece

Moderato in C - yet a third one by Sor with the same name!

Moderato in D - another Sor piece, but with a different name

Untitled - an untitled Sor arpeggio

Waltz and Variations - by Ferdinando Carulli

I hope to be adding more in the future. Let me know what you think of these selections.