Just to clear up any confusion:
The post linked was for the Alpha version of breezewallet, this was indeed released and has been tested hard since then.
The release coming next Friday is an Alpha release of breeze with tumblebit. This add's in the tumblebit tech which we have all been waiting for.
The alpha release will still be on testnet, and available for us to all try and break, and then all being good, soon after will be the Beta release on mainnet.