DIY--public portfolio under parents' or teacher's email account. Designed for kids. Kids can upload videos and images of projects. Fairly new and worth exploring.
Is YouTube blocked inyou school? Here's a 'video catcher' that allows you to capture and use later. It's a good work around for blocking. In my opinion, too many schools block YouTube when there is good content to be found (though there's a lot of junk as well).
I personally LOVE Dropbox and here's a great review of this cloud storage tool. You can share files easily and files are automatically updated as you work on them from any computer. I give this my HIGHEST recommendation.
Kikutext allows text messaging to students and/or parents. Free, though, of course, there maybe costs associated with service you are using. Might be helpful.
Grokking is new to me--looks like a powerful search possiblities that allows a mindmap of related terminology. You can create a teacher account, specify difficulty level, create graphs and more. Looks very interesting.
You can set up online meetings with Ohours--open office hours. I see lots of potential here for online meetings.
You can also meet other people, which doesn't seem to me to be terribly helpful...whatever.