I signed up for the free account, which allows you to create two "trains of thought" (the paid version cost $25 and is unlimited). Within your "trains of thought" you create "boxes" and within those you create "thoughts." Pretty much, you're creating bulleted lists. I've just started to create one about a genealogy research trip I'm planning for this spring. You can click here to see it, or view the screenshot bellow:

- Another Level of Thought. For example: above I have the Lexington County Library as a thought in my Places: Lexington County box. I would love to be able to add multiple thoughts under the library, such as an address and books I intend to look for. Maybe this level could be called details? I really think this is a necessary addition.
- More Characters. Right now there is a limit to how many characters you can type for the title of a train of thought or a box. I'd love to see this expanded.
- More Information. I'd love to be able to add a description or summery to each train of thought that wouldn't have to go into a box. This would sit right under the title of each train of thought.
- More Creativity. I'd love to be able to choose from a wider variety of colors or images when designing each train of thought. Right now I can't even upload my own avatar, let alone individual avatars for each train of thought or box. And could I pick my own background color or fonts?
- Updated: I discovered that I can add a photo to a thought using basic html code (img src="address"):

- More Socializing. I'd like to see multiple levels of shared lists. It would be nice if I could co-create a list with others and have anther option where people could add comments to my list. Also, team up with facebook and twitter so that I can share my thoughts with friends. Can I add photos from Flickr or Picasa? Maps from Google?
Even without these improvements, I think the folks behind Thoughtbox have a great idea. I'll continue to work on my trip itinerary and hope to see the site flourish in the future.