Back in the days when my "Toshiba Pocket PC e310" actually worked, there was a feature that I used all the time. It was the "voice recorder."
I would be driving down the road, have an idea, and would immediately record it by talking into the Pocket PC. Later, I would sync it with my desktop PC and have a more permanant way of storing those "captured" thoughts, ideas and reminders.
Now I don't need it.
A cool little "web 2.0" tool called "CellTell" makes it possible for me to do the same thing with my Backpack account using my cell phone.
I put the phone number in my speed dial, call it, record whatever and it's immediately posted to a page in Backpack. I can then listen to it in Backpack and even download it to my computer if I want. I can also share it with others, but I'm using it to store my own personal reminders, ideas and stuff.
Here's a sample I copied from my Backpack account:
Simple. Functional. Helpful. Cool.
And of course, like my backpack account, it's also free.