"Mosembro is a simple proof of concept web browser for the Android mobile platform which demonstrates how semantic markup (in this case microformats) can be used to massively improve the mobile browsing experience." This is where Apple's stance on competing applications is going to look increasingly stupid.

Oh, better yet an installer for this thing. Also appears to work on the n800 now.

Some chaps ported Android (minus some crucial parts, like oh.. wifi) to the n810.

"PhoneGap is a free open source development tool and framework that allows web developers to take advantage of the powerful features in the iPhone SDK from HTML and JavaScript. We're trying to make iPhone app development easy and open. For many applications a web application is the way to but in Safari you don't get access to the native iPhone APIs, and the that's the problem we're trying to solve."

Android platform source code

Vaporware Twitter client for Android.

0.9 (beta) release notes