I just had a play with SimpleGTD - that's some tasty AJAXing. But I couldn't see how it does dependencies between actions: if action A depends on action B which in turn depends on action C, is there any way to indicate that in the software?

All I saw was that some actions can be marked as next actions (presumably that's what the star is?), and some actions can be left unstarred (gtd-php operates in the same way). I do like the drag-and-drop task-ordering that simpleGTD has got: I used that in MS-Project a lot, and have been considering implementing it in gtd-php.

And I didn't see an easy way to do the weekly-review task of identifying those projects that have no starred action, in SimpleGTD - is there one I'm missing?.