GTD - a new d3 is on the way

I started playing with GTD, I checked out MonkeyGTD and d3, as well as others (one with a Ruby on Rails backend).

I like d3 for the simpleness, however there are some things I would look at changing.
http://www.dcubed.ca/

Google Group Discussion
http://groups.google.com/group/GTD-TiddlyWiki

I want to get to a point where GTD is my main area for journal, tasks, project list, etc.

Some things I want to add:
checkbox for common tags such as estimated time,15min, 20min.

Also I want to customize the RSS options as there are pocketmod templates which can read rss.