Digital Dropbox: I love this component, although it could be cleaner and more effectively designed. Essentially, students can submit word documents into this little "box" -- which is so much more convenient than having them email me attachments and clogging up my inbox. I use it as a back-up for anything they submit to me (papers, exams, weekly commentaries) and a way to confirm that they submitted the paper by the deadline. It's also very handy for downloading a fishy paper to scan it through the plagiarizing software (if your campus has it). A few of them take a while to figure it out -- they can get confused about uploading a document into their own account versus actually sending it to my account, so just be aware of that potential problem.
Just one little helpful hint that I am not sure has changed with newer versions...
If you decide to show students "how to use the digital dropbox" in class, be advised that how the instructor accesses it is different than how the students do.
I found this out when I tried to show students how to use it ...and couldn't. Their screen looked different than mine did. It was in a whole different section.
WebCT had this cool "Instructor view" vs. "Student view" feature. Not sure if the combined platform does that now too.