I need to find a website that contains songs in sol-fa notation,
simple folk songs and children's songs.  These should be a text file
that can be easily parsed.  It would be even better if the notation
are presented in numerical form (e.g. 1 for "do", 2 for "re", etc). 
The more uniform the format and simplier the better because I'm
writing a program that uses these sequences.  I don't need the words
to the songs.  Just the do-re-mi's.  I would like to get 100 songs or
more.

You may be interested in "The Digital Tradition Folksong Database", 
freely available here:

http://www.mudcat.org/folksearch.html

Here's another index of the same database that has a useful description
of the music notations used and links to those songs that contain
tunes (many songs in the database only have words). 

http://sniff.numachi.com/~rickheit/dtrad/

Cheers,

Eadfrith