Note: video contains major spoilers.

There a new interview with Jonathan Blow that hasn't been posted anywhere yet, and it comes with two HD gameplay videos embedded at the end of the article. The first one demonstrates how to get one hundred percent completion on World 2 in under ten minutes, while the second video shows some gameplay from the Jumpman level.

Interview with Jonathan Blow
one-minute preview of World 5.5 (spoiler warning)
full achievement list
Braid blog