Since release Opera Mini 21 beta updated twice, to 110234 and now 110494 (afaik). I do like to run bleeding-edge nightly builds, but without Google Play Services I have to check for updates myself.
It would be quite helpful, if Opera would notify the beta community when updates are released, maybe with a brief description on changes (more than just the usual 'improved stability and ui changes' blah blah.
A read-only sticky thread would suffice.