Our parish has an online church tour that correlates beautifully with the parish chapter in our Religion book. Students use MapBlast to make maps showing the route from home to school.
Students check to see if our class has received any email.
We took part in an electronic postcard project last year, and we've also tracked a traveling buddy. If you don't have a project ongoing, you can sign up for a joke of the day, word of the day, or other service, just so the kids have a chance to learn to open email. If you want to, you can have parents send email to your class. When we were studying occupations, I've bookmarked the URLs for parents' workplaces to use at center time. At this point in time, we don't have a fast enough computer in the room for this kind of project.