Palm Unveils WebOS SDK and Mojo Messaging Service at Web 2.0 Expo

Palm has made an exciting announcement at the Web 2.0 Expo, revealing that they are releasing the software development kit (SDK) for WebOS, their innovative mobile operating system. This move opens up opportunities for developers to explore the potential of WebOS through the Mojo SDK, which was previously accessible to just a limited number of invitees.

During the presentation, Michael Abbott from Palm demonstrated how developers can leverage the Mojo Messaging Service to interact with the messaging stream on a Palm Pre device using a notifications service hosted by Palm. Additionally, Abbott introduced an emulator that enables WebOS users to run their legacy Palm applications, effectively bridging the past with the future.

One notable feature highlighted was the Mojo Messaging Service, a push notification service that empowers developers to send real-time updates, such as message receipts, without disrupting the user experience. This approach, while reminiscent of Apple’s notification system showcased at the iPhone 3.0 event, offers a unique twist by utilizing a non-intrusive notifications bar within the WebOS environment.

Palm’s strategic focus on attracting developers to WebOS is evident, aiming to capitalize on the growing demand for mobile applications. By targeting developers familiar with HTML, CSS, and Javascript, Palm seeks to foster a thriving ecosystem around WebOS applications.

In a thoughtful gesture towards existing developers, Palm introduced “Classic,” an emulator bundled with WebOS that supports the compatibility of older Palm OS applications on newer devices like the Pre. Interested developers can access the SDK free of charge without any membership requirements, emphasizing Palm’s commitment to fostering innovation and inclusivity within their developer community.

Looking ahead, Palm continues to generate anticipation around the Palm Pre, with details on pricing and release dates still under wraps. Despite the ongoing speculation, Palm’s progressive steps towards openness and developer engagement bode well for the future of WebOS and the mobile industry as a whole.


  1. What did Palm announce at the Web 2.0 Expo?

    • Palm unveiled the software development kit (SDK) for WebOS, their next-generation mobile operating system.
  2. Who can access the Mojo SDK?

    • The Mojo SDK, previously limited to a select few, is now available for developers to explore.
  3. What is the Mojo Messaging Service?

    • The Mojo Messaging Service is a push notification service that allows developers to send real-time updates without disrupting user activities.
  4. How does Palm plan to attract developers to WebOS?

    • Palm aims to appeal to developers familiar with HTML, CSS, and Javascript, leveraging their expertise in building WebOS applications.
  5. What feature distinguishes Palm’s notifications system from Apple’s?

    • Palm’s notifications bar in WebOS offers a non-intrusive approach compared to Apple’s text-message-like pop-up notifications.
  6. What is the purpose of the “Classic” emulator introduced by Palm?

    • The “Classic” emulator enables the compatibility of older Palm OS applications on newer WebOS devices like the Palm Pre.
  7. Is there a cost to download the WebOS SDK?

    • Developers can access the SDK at no charge, emphasizing Palm’s commitment to supporting innovation.
  8. Do developers need to join a Palm developer association to access the SDK?

    • No, developers are not required to join any specific developer association to download the SDK.
  9. What important information did Palm withhold regarding the Palm Pre?

    • Palm has yet to disclose details on the pricing and release date of the Palm Pre, generating anticipation among consumers.
  10. When did Palm make the registration page for the SDK live on their website?

    • The registration page for the SDK went live on Palm’s website on Wednesday.
  11. What is the focus of Palm’s strategy towards developers?

    • Palm is strategically targeting developers to build a robust ecosystem around WebOS applications.
  12. How does Palm demonstrate inclusivity towards developers?

    • By offering the SDK free of charge and without membership requirements, Palm showcases its commitment to engaging and supporting developers in their community.


Palm’s recent announcement at the Web 2.0 Expo marks a significant step forward in opening up opportunities for developers to explore and innovate with WebOS through the release of the Mojo SDK. The unveiling of the SDK, alongside features like the Mojo Messaging Service and the “Classic” emulator, underscores Palm’s commitment to fostering a vibrant developer community and embracing the future of mobile applications.

As Palm continues to generate excitement around the Palm Pre, details on pricing and release dates remain undisclosed, heightening anticipation among tech enthusiasts and consumers. By engaging developers with accessible tools and a focus on inclusivity, Palm sets the stage for a compelling evolution in the mobile landscape.

For more information and to join the developer community, visit Palm’s website and dive into the possibilities of WebOS today.