After running these commands:
gpg --keyserver keys.gnupg.net --recv-keys 0x8D8AEBF1
gpg --check-sigs 0x8D8AEBF1
it appears that the Trisquel signing key is only self-signed.
The key should ideally be checked and signed by people in contact with Ruben so that a Web of Trust is formed.
Thank you!
I'll mark this as closed then? (since quidam's personal key is signed by other people anyway)
Signed and sent to keys.gnupg.net