Scribbly is a an application from Adobe (uses Adobe Air) for emailing notes to yourself or others. This really is a nifty little app (free) that is easy to use. After installation a person can type on a note pad (similar to stickies on a Mac) and then email it to themselves.
I would probably be more inclined to use something like this then some online note taking site just for the fact that I take notes at any given time and I don't have to worry about staying logged into a site.
Below is a sample of Scribbly in action...
Download Scribbly by clicking here.