Thought on the Kindle

When is the Kindle going to open up its platform for third party developers? The opportunities both within and outside of reading on the Kindle are tremendous:

Reading:

• Highlighting - Get a page of just your highlighted text with annotations and footnotes automatically appended. This would surely popularize the Kindle with students.
• Note Taking - I love to write notes in my books, and if I could do this on the Kindle, that would improve my position regarding its value!
• Touch Screen - This would be in the service of highlighting, but also a more fun way of flipping from page to page. It would restore some of the tactile euphoria lost by the transition from an analog to a digital medium.

Other:

• Pictures
• Games
• Web browsing

Just a tentative off the cusp list... Any additional thoughts?