Here's the thing: When you publish duplicate material - no matter the site - you will be penalized by search engines. Google especially will not look kindly to that. Now, if you wrote something on HubPages and wanted to summarize - in different words - on your Wordpress site, then that's okay.
You can easily link back to your hub in a Wordpress site, as well as use the HubPages widget in your sidebar. If you have Twitter enabled in your sidebar on your Wordpress site, you can also tweet the HubPages link and it'll show up on your sidebar that way.
But anything more than about 1% of a page in duplicate content is not a good idea and that's usually a good rule of thumb to abide by.
This is also why it's a good idea to regularly check for duplicate content on your articles/hubs using a service such as CopyScape.