Hi Vamsee,
First, I can't give you timelines; we don't have them. Our current goal is to release the 6.x LTS in June. We'll see how that goes. :-)
Regarding project tags, that functionality hasn't been implemented yet; we're not holding out on you. :-)
When they're ready, Release Candidate versions are announced in this group. We'd love your feedback when the 6.3 RC is ready!
Ann