I recevied an email from my dealer last weekend, so the communication chain is Meridian, Dealer, Customer.
If you are a Sooloos user and did not receive any communication I would get intouch with your dealers.

Regards,
Carl

The email contained the following as an attachment:

Dear <XXX>,
Meridian Sooloos System Update � Sooloos 2.1 build 355

I am happy to advise you that the next update to the award-winning Meridian Sooloos 2.1 software is ready for release and that the update to build 355 will be pushed out to all Meridian Sooloos Digital Media Systems on Monday 26th September 2011.

This latest update includes two important new features:

Support for the new Media Drive 600 has been added so that this brand-new system storage component can be simply added to any Meridian Sooloos Digital Media System.*

Support for Control:Mac on MacOS 10.7 (Lion) enabling Mac users running this latest version of the MacOS to make full use of all of features of Control:Mac.

In addition to these new features, there have also been a number of improvements made to system stability.

This latest build of the Sooloos 2.1 software will be pushed from the Sooloos cloud during Monday 26th September 2011. All systems connected to the Sooloos cloud via an internet connection should receive this update. You will be notified that the update is available via a flashing message indicator in the top right hand corner of your Control 15, Control:10, or Control 1 interfaces, or via a message displayed through Control:PC / Control:Mac.

Once the update has been received, you can choose when to install it, so as not to disturb listening activities.
Once the update has been installed, we recommend that all Meridian Sooloos components on the network are rebooted. Please keep in mind that not all components will install the update in quite the same amount of time, so patience is always advised.

If for any reason after Monday 26th September you find you have not received the update to build 355, please let us know by emailing <your email address here> with details of your system including the serial number and MAC IDs of your Meridian Sooloos products.

If you have any questions relating to your Meridian Sooloos Digital Media System, we will be happy to hear from you.

Best regards,
<Your details here>

* Details on Media Drive 600 are available on the Meridian website www.meridian-audio.com

861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)