DH travels most weeks for business and he tries to email each child at least once every week so they know he is thinking about them. I find sending them a quick email is a good way to make sure I do not forget to mention something that comes to mind mid morning (while they are in school)--and I often find websites I want to share with them (like I emailed the links to the London and Rome scout patches to my DD yesterday because she has already done the activities and could just fill out the paperwork and get the patches).
I had to check with her to make sure that she knew he used her account. It turns out it was her idea. He can type better than speak (he is a special needs child) and the teacher wants him to start sending me e-mail updates from school. For a second there, I thought my kid was a computer hacker though. 