The Apple World Travel adapter set contains adapters for these countries:
North America, Japan, China, United Kingdom, Continental Europe, Korea, Australia, and Hong Kong

Now, if the plug-system in Venezuela is similar to the system in any of these countries, then I'd say yes, it is supported. Otherwise, you might be better (and cheaper) off if you get a specific adapter for your desired country/destination - would definitely be the cheaper solution I'd say.

The voltage shouldn't be the problem - the iPod adapts from 100V-250V - it's just the form factor of the plug that counts here.