From Mike Reiss's blog :

Goodell said "the fundamental information that Matt provided was consistent with what we penalized the Patriots for."

Goodell said he did not anticipate any more penalties against the Patriots.

Goodell also said he was able to verify there was no walkthrough tape, no one asked Walsh to tape the walkthrough, that Walsh was unaware of anyone else taping the walkthrough, and that Walsh had not seen such a tape.

Further commentary to come...