Official page is now up.....
http://www.nintendo.co.jp/ds/browser/index.html

The site's Q&A section reveals a few bits on what we can and cannot expect
from the browser. First, the good. The browser supports full stylus-based
controls, for scrolling and jumping between pages, and even for inputting
characters through direct handwriting or via a software keyboard. The
browser keeps track of previously entered phrases so you won't have to enter
them again.

Now for the bad. The browser won't be capable of displaying Flash and PDF,
nor will it support video and sound. While you can save bookmarks to your
favorite pages, you cannot save images or other elements of pages.

Pretty cool looking though......