So to use this, you would generate a public/private key pair, and compute the hash function of the public part. Anonymously post the public key to alt.key.announce, and then send your message by whatever means you like (anon mail, anon post to a regular newsgroup, anything) using reply.HASH@remailer.com as your return address. Then watch alt.w.a.s.t.e for replies and decrypt as received...
one problem is that pgp labels public/private key pairs with strings (thus I have to create a public/private key pair with a unique label string that has nothing to do with my name) the problem still exists that every message posted to alt.w.a.s.t.e with have my pgp key label string. pgp does not support unlabeled crypted test (eg: I can had it random cyphertext and have it figure out public/private key pair to use (by trying every key in my rings)(