Today I got my hubs featured. As far as I can see you need a good sound informative and original hub to get featured. And getting featured will not happen overnight. You will need to publish your hub to a good standard and promote the hub using hubpages guidelines.
Look over your hubs to make sure that it is free of error and does not in any way break rules set out by Hub Pages. In time as traffic rises to your hub and Hub Pages verify originality among other things then your hub will become featured. Also take part in forums, ask questions, answer questions and use hub pages where-ever you can. All this activity also helps you get featured.
These are just some tips from me. I hope they help.