Just got the following email:
SmartThings Hub firmware beta update!
Thank you for continuing to take part in the SmartThings firmware beta. We will be rolling out a new update for your Hub in batches starting on the 26th June. We will send out an email prior to updating your Hub. The update will take approximately 5 minutes and includes the following new features:
Faster boot times
Faster local automations
Increased number of zigbee devices that can directly connect to the hub
Fix problem with some Schlage locks not reporting lock status
Improves reliability with ZigBee FW update
Fixes Z-Wave network repair related issue
Improves general error handling and logging in hub
Provides ZigBee FW update for SmartThings sensors and outlets, Sengled Classic bulbs, Iris sensors and the Halo smoke alarm.