what is the difference between genderqueer and bigender?

From my understanding genderqueer is like an umbrella term for anyone that is anything other than just man or woman. I think it can also be used to describe someone that is at odds with societies gender roles. see http://en.wikipedia.org/wiki/Genderqueer

Bigender is a gender identity. Bigendered people often have seperate feminine and masculine 'personas'. They kind of switch between these personalities. Some I have meet are aware of these personas as seperate entities with different names and likes. They also have converstions with each-other, like two people in one. Have a look at http://en.wikipedia.org/wiki/Bigender

interesting, thanks for the link.