I hear you about VoodooPad, but I gave up on GTD on that rather quickly. It's now a place where I keep project notes, not where I manage my day.

Had we not lived in the age of Internet convergence and lightweight web application frameworks I would tend to agree that web apps are not the answer -- but I assume I'm talking to geeks here -- if I was addressing this to Grandma I'd give her a pen and paper... but it's just not the case anymore, look around you. Typo, Flickr, Upcoming, Tada Lists / Basecamp -- it's all the rage... GTD systems are the exact fat client target that AJAX is targeted at replacing.

Now I use a single powerbook for just about everything so it's not a huge ordeal, but hooking into Quicksilver and Markdown+SmartyPants markup is just too good to be true. Centralized storage is good, it solves the exact problem addressed above (my crap is in >1 GTD system whereas I'm probably better off not using GTD anyway). The question is how do you handle the storage side of the thin client... For example, look at how Safari and Vienna handle RSS feeds (sqlite backends), set the feeds to never expire articles and you have your recording source for all the external information you take in on the Web.

I spent a lot of time using DEVONtechnologies' tools (and still beta testing)... waiting for the day that blackbox databases catch up with my filesystem. I am a Spotlight guy now, using TagBag for file-based GTD (but certainly looking for a better, non-Dashboard way) I think GTD spans so much further then ToDo lists and tickler files.

Finding ways to tie the to-dos, project notes and deliverables together has been the life quest that got me into GTD in the first place... Quicksilver and NExT (erm Mac OS X) Services have played a big piece here, but I stlll use a ton of different apps to keep it all together (Quicksilver, VoodooPad, sidenote, iCal).

I am getting an iPod nano soon for the calendar/todo list and the fact it also plays music. I could never get into moleskins and PDAs, too bulky. I have a usb voice recorder for verbal cued shorthand that I use as a GTD recording device when not in front of the laptop, and transcribe it into my powerbook once I get back to it. Olympus makes a nice one that is the size of a pack of trident gum. That's another nano feature I'd like of course so I can consolidate the devices to carry a single very small instrument when away from the laptop. It's already very slick that VoodooPad can kick off your entire project wikis to your ipod notes and you can wheel through the CamelCase words.

Pardon the braindump.