Invites are going to start being handed out on August 11th. Apparently early supporters and active forum members will be getting invites first. I would hope that people who purchased the one plus and/or invited other people and they purchased would at least get 1 invite but no one knows for sure yet.
The invite system is different this year. You just need to register your e-mail and they will let you know when your invite is ready. You can do that here.
https://oneplus.net/ca_en/invites
You can also move up on the invite list apparently by having people sign up using your invite referral link if you want to try that. Specs and general impression on the phone are very good. Price is $409 for the 16GB and $479 for the 64GB. Keep in mind I believe the 16GB only has 3GB ram and the 64GB has 4GB ram. Also I think launch time only the 64GB will be available.
General impressions on the phone are very good. You can google some reviews, etc. Most people seem to think its a very premium device especially for the price. It is missing a few things some of the high end flagships have though. No MicroSD slot, no non-removable battery, no fast charging, No NFC. On the plus side it does have dual sim support and insane specs. No NFC might be a deal breaker for me. I use that quite a bit.