For those seeking a complete overview of the current versions of Atlassian server products, look no further. I present you https://iapetus.fyi! *
The goal is to create a single page which shows all current & archived versions (incl. EAP releases). For now it only lists current versions. In addition, it will be expanded with web hooks and e-mail/hipchat/slack/etc notification schemes to allow for automated updates as soon as an Atlassian product has been released.
Any suggestions, etc, can go in the comments!
BTW, the project will be open sourced asap to enable contributions.
*) My sincere apologies for the tongue-in-cheek name, just couldn’t resist myself.