The Omni Group today announced the first public beta release of OmniGraffle 4, with the final release slated for early summer. The new version is a major update to the diagramming and drawing application, and offers a streamlined user interface, as well as many new features under the categories of brainstorming, drafting, import and export, and document management. Some highlights from OmniGraffle 4 include a new dynamic outline view, diagram styles, a Bezier curve drawing tool, and greatly improved import and export options. OmniGraffle Professional 4 adds master canvases, notes, tables, document scale, improved Visio XML import and export, and SVG export, and more. OmniGraffle 4 will cost US$79.95, and OmniGraffle 4 Professional will cost $149.95. Upgrades from OmniGraffle 3 to 4 will cost $29.95, and upgrades from OmniGraffle 3 Professional to OmniGraffle 4 Professional will cost $49.95. Any OmniGraffle 3 purchases made on or after April 25 will be upgraded for free to OmniGraffle 4 when it ships.