Hi, LeroanZ
Unfortunatelly we still can't set a specific release date for v3, I can tell you however that is under heavy development and it's coming along nicely.
If you'd like to migrate to Centova Cast today, you could use our stable v2 and simply upgrade to v3 when it's ready.
Upgrades are free for all customers with an active support agreement and the update process should be fairly easy.