Could I? Should I?

As I continue to peruse Classroom 2.0, and go through different topics and discussion threads, I am left wondering how much of this stuff can I really use?  How much should I use?  Will it really help my students learn or is it just some cool stuff that will clutter up their learning environment.  For instance, Moodle and Virtual Learning Environments look really cool and I can see how they might be used.  But is it really worthwhile to add another site, another set of passwords and usernames to what the students already have to remember?  The video conferencing, Skype and screencasting also look like they have tremendous potential for collaboration across the globe but do my projects really lend themselves to such things?  Or is it just more clutter?  Interesting questions to ponder.