I have 2 Keybase.io invitations to give out. What is Keybase?:
Keybase will be a public directory of publicly auditable public keys. All paired, for convenience, with unique usernames. (https://keybase.io/)
It is quite awesome. Works with the gpg keys you already have and also lets you do browser encryption if you whish so. You can upload a private key, but since it is protected with a passphrase it should be secure.
Please post why you want a keybase invite. You should be active on there and at least validate your accounts, and sign / track some other people.