The {{{<<<RandomQuote>>}}} macro (see HelpOnMacros) also works for a list of images:

 * {{http://static.moinmo.in/logos/moinmoin.png}}
 * {{attachment:PythonPowered.png}}
 * <<Icon(smile.png)>>
 * 1234

The code:

{{{
[[RandomQuote(RandomQuoteImageDemo)]]
}}}
Results in:

<<RandomQuote(RandomQuoteImageDemo)>>

(refresh your page to see effect).