List all bundle types for entity field query? Trying to use entity field query to simplify some times; e.g. a slide show of images.

How does one get the field values for entity field query. Specifically, get a list of all the possible bundle types there are?

E.g. 

&lt;?php

function foo_load() {
   $query = new EntityFieldQuery;
   $query
     // What conditions or properties are there?
     -&gt;entityCondition('entity_type', 'node')
     -&gt;entityCondition('bundle', 'banner')
     -&gt;propertyOrderBy('created', 'DESC');
     -&gt;propertyCondition('status', 1);

}
If as per your example code you are just concerned with nodes then the bundles are just your node types.

If you want to get a list of node types you can use:

node_type_get_types()
or
node_type_get_names()

You can get the bundles from the array keys of the arrays returned from those functions.