To further crowd a field amply covered by the GTD, GTD2, and GTDAlt bundles, I've written my own bundle, called LGTD (Little GTD). It uses Markdown syntax for your Next Action lists, coordinates lists between project-oriented views and context-oriented views, and has a command for printing lists to index cards for Hipster PDA users. I've written a few posts about it on my blog, starting with this one
http://www.leancrew.com/all-this/2006/12/ a_little_more_gtd_with_textmat.html
which has links to the later posts.
LGTD does very little, but it does what I want. It may do what you want.
-- Dr. Drang