I've been using version 1 since it came out, and recently upgraded to 2 which is much better - in speed alone.
1: Absolute and/or Relative. We need access to both.
2: Place holder text in new divs.
3: I'd like to see "color" and "layout" separated into two styles sheets, but that is likely just me :)
4: Ability to Save a Preset, and save the CSS files without creating a new html page.
5: On the Output Tab - why is the default to save the style in the document head. The whole point of style sheets is to save the layout in an external file. External StyleSheet should be the default, and allow users to choose the others if it is really needed.
6: CSS Tables! YES! These are not to be confused with HTML tables, and to be fair, I hate the name CSS Tables (should have been called "grids or something similar").
7: Retaining the chosen DIV when you move tabs :) This is currently a pain and the reason for many an error!
8: An easier way to edit the existing style sheet. I may be missing something, but I would love to have an edit button, rather than opening a new instance of CSS Sculture, hopefully grabbing a saved copy, and re-saving only to create yet another HTML file. Very reduntant.
Aside from those - I love this product. Very clean code that adapts to all browsers very, very well. Great job on this product!