Next week we'll arrange a Vaadin Developer Meetup on March 11th in London, UK. The core of the relaxed developer-to-developer event is discussions about Vaadin roadmap, future development and showing each other what has been done with Vaadin.

Just drop in for a chat with fellow developers, rant about the most annoying bugs in Vaadin, praise the killer features and get to know each other. The meetup is organized during QCon conference, but it is free and open to everyone.

See more info and please register to the event at http://vaadin.com/meetup.

The Vaadin Refcard is finally out at DZone.

If you're a newcomer to Vaadin or interested in finding out what it is, the Refcard offers a great introduction to Vaadin. Much of the reference material should be also useful to those already familiar with Vaadin.

The six pages of the Refcard present a well thought summary of the most essential features of Vaadin, which are covered in detail in the Book of Vaadin. Much of the reference information is presented in tightly packed diagrams; just look at them for a moment and you'll see the genius of Vaadin :)

The contents are:

• Creating an Application
• Components
• Layout Components
• Themes
• Data Binding
• Creating New Components

Download yours now or browse the card on-line.

Jfokus 2010 is the biggest Java conference in Sweden. Vaadin will be there on January 27, 2010. The conference seems to be sold out, but if you already have a conference pass come and meet us at the booth 14. We'll show you how Java-only web applications are built with Vaadin.

Like in some conferences before we will be giving away few copies of the Book of Vaadin. This time in blue.

Also, if you're attending the conference, be sure not to miss the presentation on "RIA Security - Broken by Design" by Joonas Lehtinen: "Rich Internet Applications (RIA) provide desktop-like usability with web deployment model. The benefits of this combination are obvious and RIA is now common a choice for the presentation layer in many applications. Unfortunately, moving logic from the server to an untrusted client may open up security holes that would not be present in the page-oriented "Web 1.0" architecture. In this presentation we will take a look at client- and server-side RIA architectures from the security angle, identify some of the most common security problems and discuss strategies for avoiding them. We'll go through some example applications implemented in both architectures and demonstrate the problems. Java-based RIA frameworks, Google Web Toolkit and Vaadin, are used in the examples, but the demonstrated principles are applicable to most other frameworks and languages as well."