September release
The September release brings in a long awaited improvement of the Dashboard, which you'll notice next time you log in. 
You'll also notice the red "What's new" notice in the top right, which shows recently added features - in this case a "I use Scalr!" link that takes you to your profile page where you can add some information about yourself or your company, and appear on a special Testimonials page. There's no obligation to participate, but if you like Scalr, it would help others make a decision, knowing that peers have chosen it.
We also added some API methods: GetScriptDetails, RebootInstance, GetEvents, GetLogs, and added the ability to execute scripts with specified revision and parameters.
Plus a couple of improvements:
* Added ability to edit farm role specified security group
* Added Hide terminated instances checkbox on instances list.
* Added ability to view all instances (include non-scalr ones)
* Added ability to set system timezone for clients (Logs, Events, API logs)
And finally, there's a couple of bug fixes:
* Fixed bug in garbage.php with "select all" checkbox
* Fixed bug with default SSH port (see thread)
* Various bugfixes and improvements
Scalr.net August release
More good news, this time for subscribers at Scalr.net. The following changes are now available:
API improvements:
* Added 3 new methods: LaunchInstance, TerminateInstance, GetFarmDetails
* Improved the ExecuteScript method.
Core improvements:
* Rewrote the "Synchronize to all" feature. Cleaner and more reliable now.
* Same goes for AutoEBS and AutoEIP. Cleaner and more reliable.
* When you create a new AMI for a custom role, you can now switch over to it immediately.
* And the long awaited "Keep me logged in" checkbox on the login page!
Events system improvements:
* Added new event: OnDNSZoneUpdated
Scripting engine improvements:
* Added the %zone_name% variable for scripts executed on DNSZoneUpdate event
* Added the %new_ip_address% variable for scripts executed on IPAddressChanged event
* Added the %volume_id% and %mountpoint% variables for scripts executed on EBSVolumeMounted event
Fixed numerous of bugs.