I hate email. Hate it! It takes me forever to reply to emails, and sometimes I just never get round to replying at all…
Email is so one-on-one, which is not what a community site is about. People love posting things like “Please email me study notes for ACN102N”, while they should be checking the uploads to see what’s available for everyone, and uploading whatever they have for everyone. Sending individual emails is so inefficient!
The problem is this: If a student sees that there are no study notes for a certain module, they are going to want to ask, or want to at least be notified via email as soon as notes become available. I’d like to do away with these types of emails and get students to use the following:

This is Google Reader and you can get it on http://www.google.com/reader
What it is, is a way to keep updated with websites that change frequently, like blogs and wikis.
The above screenshot shows how a MediaWiki change is reflected in Google Reader. The original text is on the right in green, and the newer text on the left in yellow. The change to the text is in red, so you can see exactly what has been modified.
The advantage: You don’t need to keep visiting a website to see if there is something new. All you do is go to your Google Reader online and see which of the websites you follow have been changed. You visit one website instead of 10 (or however many it is you visit regularly!)
I am going to encourage use of RSS readers like Google Reader, and whatever other ones anyone cares to suggest.