The finalists were announced this week. File 770 has a great post on finding links to the finalists in advance of the Packet.
Where to Find the 2017 Hugo Finalists For Free Online
If you are a member of Worldcon 75, or become one before the Hugo Voting Deadline, you can vote for this year's Hugo Winners. Winners announced on the FRIDAY (note, departure from usual Saturday date) of Worldcon in Helsinki on 11 August.