Today, Apple released the new beta of the SDK from the iPhone. It is version 4.0.
In the iPhone DevCenter you will find this the download.
New in Version 4.0

• Multitasking
• IAd
• Over 1,500 new APIs
• …

What all is new, can be found here

I just found this link … http://phonegap.com/.  ” … PhoneGap is an open source development tool for building fast, easy mobile apps with JavaScript. If you’re a web developer who wants to build mobile applications in HTML and JavaScript while still taking advantage of the core features in the iPhone, Android and Blackberry SDKs, PhoneGap is for you. …”

I will check it out. If you have experience with it … leave a comment …

On adobes lab site: http://labs.adobe.com/technologies/flashcs5/appsfor_iphone/ they state that Flash Professional CS5 will come with a compiler that translates flash actionscript 3 into native iPhone application code. This will open the iPhone for flash cross-plattform development – so at least 3 big mobile platforms will be supported (android, iphone, symbian) and of course flash will still run in any browser that has a flashplayer plugin. So mobile developers – instead of learning J2ME, android SDK, iPhone SDK, symbian SDK and Qt … you might want to have a look at this interesting product and publish your apps on all platforms. At the website you can see a demo video and sign up for the planned beta test version … http://labs.adobe.com/technologies/flashcs5/appsfor_iphone/

You are thinking of your first app for android or iPhone? And you don’t know where to start, how to start or even if it’s worth it to start at all? We were facing this question for a while now – and we think that the time has come to start developing apps for mobile devices. But where should you start? What are the pros and cons for android, iphone and symbian? Where can you make the most money? What is the future? Or can you just use J2ME and run your app on all platforms? Where can you find the best tutorials, which is the best IDE? Do you need dozens of differnt devices to test your app on? How can you bring your app to the app-stores or to partners like jamba? How much time will it take you to build your first tool or even a game that anyone would buy?

In the next weeks and months we are going to answer all these questions in our “Become a mobile developer howto” …