IxDA, User Experience and Usability Websites

I am currently researching on a website with immense data and this
company being a corporate needs some good user interface that will
showcase this data, get more hits, have interactive elements, etc.
This software company has a 18 year history.

Can the IxDA community help me with a few things on IxD, UX and
Usability.
(1) Websites that help me understand all the three things mentioned
above.
(2) Website examples with good user experience.
(3) Website examples with bad user experience.