lunytunz,
THANKS for maintaining this list!! i know what it takes.
wrt your question, create a spreadsheet, then either attached it to an email in your hobby email account or setup a google docs or dropbox or whatever acct associated w/ your hobby email acct. then after you upload it, delete it from your computer file system - AND - empty the recycle bin so prying eyes dont find it and restore it.
here's a nice little utility to wipe em out.
http://www.fileshredder.org/index.php
sorry for the sidetrack, but you did ask "I never thought I would need a spreadsheet to keep track of providers, but it seems that I do. Now where do you suppose I hide that?"