I am pretty much excited to play with lightning desktop after looking at the demo .Going through the trailhead but cant see it enabled in my org[00D280000011Q93] .When this will be available for users i India?

This component works but does not validate and gives the following error message:
Step not yet complete... here's what's wrong: 
The CSS does not contain a reference to the background image 
Note: you may run into errors if you've skipped previous steps.

I'm following a well written tutorial written by @andymahood__c: http://www.tquila.com/blog/2014/11/17/setting-lightning-connect-and-your-first-external-object

When I get to the step #3 ... "Select Edit on the CustomerID field, ...", I don't see Account (or any objects to relate) listed in the drop down box. I have created the custom field on ACCOUNT named CusotmerID Text(5) and marked it as External ID as follows:

CustomerID CustomerID__c Text(5) (External ID) [Checked]

Any ideas?