After several months of development, Balsamiq recently released a public beta for the next major version of its mockup tool: Balsamiq Mockups 3-Public beta.
The propably most important change in this version is the new way of project management which makes it easier to keep track of the contents and to share them with others.
Balsamiq Mockups 3 introduces a new file format for its projects (BMPR). It contains all mockups, images and other required sources, i.e. it no longer requires a special folder structure. Balsamiq Mockups projects from previous versions can be easily imported to the new format.