I love where this is going. One thing that I would like to see included, which is absolutely essential for the way I design website is line-height: it is the core structure of my design and layout. (Read more about line-heights and vertical rhythms here: http://24ways.org/2006/compose-to-a-vertical-rhythm)

At this moment in time I feel trapped using Adobe products to produce my layouts. If jMockups solves the following problems in priority, I will make the switch!

1. Render fonts accurately 2. Render line-heights accurately 3. Better drawing path tools