signup is open for the Over the Air event on Friday & Saturday 4-5 April 2008 in London, organised by Mobile Monday London - it's free, sponsored by BBC Mobile (more on Over the Air, and schedule).
The Over the Air blog describes it thus: "Bringing together developers, designers, hackers and entrepreneurs to explorer the potential exciting future of wireless and mobile devices/applications... Over the Air is unlike any other event you have ever been to. Part conference, part un-conference, part open hackathon. The schedule has a place for everyone, hackers, developers, designers and entrepreneurs.... all aspects of mobile/wireless development and design. From development with SDKs available on Android, iPhone, Java, Compact dot Net, Symbian, etc. To designer insight into Mobile Flash, Social Systems, Mobile Widgets, Mobile SVG, Location, User Experiences, etc. We have almost everthing covered including Gaming, Network APIs, real-time communication, advertising, etc."
Looks like almost everything's going to be covered from Java and Symbian to the Apple iPhone SDK, Windows Mobile and Google/Open Handset Alliance's Android.
So I've registered, and yay I got a ticket!
Register now if you're interested.