I recently sold my MacBook Air, and I deauthorized iTunes, wiped the hard drive, and reinstalled snow leopard (the os version that came installed with the MBA). 

I stumbled upon this shortly after, which made me very nervous since I didn't do it. 

<http://support.apple.com/kb/HT5189>

This is what I didn't do:

> 
> Turn off Find My Mac and sign out of iCloud
> 
> 
> To turn off the iCloud service on your Mac:
> 
> 
> Choose System Preferences > iCloud. Deselect Find My Mac to disconnect
>  your devices from iCloud. Click the Sign Out button on the left side.
>  The system automatically removes iCloud data from all of your devices.
> 
> 
> 

How nervous about this should I be? Also, is there anything I can do now that the computer is not in my possession?