Here's 10 Gmail invites:
http://gmail.google.com/gmail/a-fbb7d5b7ef-d965e9e361-bc13a70e39
http://gmail.google.com/gmail/a-fbb7d5b7ef-234b6db9c4-6c114d28ab
http://gmail.google.com/gmail/a-fbb7d5b7ef-65ad6d3b1d-a9ca201bfe
http://gmail.google.com/gmail/a-fbb7d5b7ef-c2f4c882b1-2923b50e07
http://gmail.google.com/gmail/a-fbb7d5b7ef-03cbb1fd5c-cf6462b509
http://gmail.google.com/gmail/a-fbb7d5b7ef-6f086353a0-58ff0bcd27
http://gmail.google.com/gmail/a-fbb7d5b7ef-487c534c46-8913a8223b
http://gmail.google.com/gmail/a-fbb7d5b7ef-e21ea65d3b-78d877eb63
http://gmail.google.com/gmail/a-fbb7d5b7ef-d5e8fc80f3-ffe67172fb
http://gmail.google.com/gmail/a-fbb7d5b7ef-dcd7caf73c-413e4bc382
Just click a link, fill in your info (removing any of my info) and sign up.