some kudos to Tada Lists
This is a bit of a catch 22 - offline use isn't nearly as critical as it used to be for me but it definitely has come into the forefront again now that I'm in Japan, don't have GPRS at my disposal like in Thailand. Offline use just becomes a stopgap solution until a new iPhone comes out. Once this happens, I imagine my experience with Internet over cellular networks will be as functional as it was in Thailand which was amazing! killed any desire to want to work over WiFi for me IMHO!
That said, I'm still on the lookout for offline capability and been using Tada as a stopgap solution for the most critical of my contexts. For the record, my contexts are starting to lose context of the "big picture" so this experiment may very well be over.
I thought I'd comment on Tada Lists while I can...people have been knocking the app and understandably - you can't change contexts is my particular annoyance. however, what I think really works is the fact that it loads very fast for an iPhone app, has a full interface on the desktop and presents a clean uncluttered interface encouraging collaboration just by sharing your lists - it doesn't try to be too much.
just thought I'd give Tada some kudos as it allowed me to iPhone apps from a different angle!
That said, you mileage will differ - I'm sure!