Jakob Nielsen has released a new study on iPad usability and interface improvements. From the article:

A year after our first usability study of iPad apps, it’s nice to see that iPad user interfaces have become decidedly less whacky. It’s even better to see good uptake of several of our recommendations from last year, including apps with:

• back buttons,
• broader use of search,
• homepages, and
• direct access to articles by touching headlines on the front page.

Read the results:  iPad Usability: Year One (Jakob Nielsen’s Alertbox).