I used to send my journals to my Gmail account using the standard iPhone note pad. With this app, collecting information and writing daily journals allows you to produce a tight integrated project, but trying to share can be a pain (not necessarily the developers fault). Trying to email your posts uses the standard iPhone interface, which doesnt add groups (i.e. you have to add them 1 at a time). It also has a built-in server to share over the web, but the interface is pretty basic.
However, by emailing your files to Posterous, you get a neat package displayed on a site and Posterous can automatically email all your followers automatically - cool!
Suggestion for improvement: also allow the upload of PDFs on tasks. Although you can take a picture of your flight/hotel confirmation, these are usually emailed to you. Would be easier if you could upload a PDF of the confirmation information.
Trevor the Canadian about My Vacation