does anyone know of an outliner program like bonsai that will run on macs? I was just looking at how well it integrates an outline with to do's and calendars.
I've used Shadow Plan for years - a recently released beta desktop for Mac is looking pretty good. It still needs a few tweaks to graduate from beta, but I think you'll find it more than capable - not quite as 'pretty' as Bonsai, but a solid tool. Handheld version is in some ways better (more functionality and customizable) than Bonsai IMHO. It's worth a look at...
Also I use Aquaminds' NoteTaker for tons of work related tasks. I have just set up GTD in its own notebook, and I want to compare which is the best solution for me. NoteTaker is at http://www.aquaminds.com . Before these I make my own templates etc in FileMaker Pro 6 and in Excel.
[You can also blog and directly browse dynamic pages in a notebook. Even one you post online with keep the embedded browsers and dynamic links. Go visit http://culturehack.typepad.com/notetakerblogging for details .. that blog is Kevin's proof of concept blog.]