I think the graph below is pretty clear in it’s indications regarding popularity of specific media.

Analysis

1. The fall in blogs coincides with the rise of twitter
2. Email is pretty constant (it’s here to stay, not increasing or descreasing – stable something to count on).
3. MSN Messenger starts to tail off around when blogs take off and then killed off with the rise of twitter (may be other messenger protocols took off also).
4. Newspapers are definitely on the decline, how they will fare only time will tell – certainly anybody following the News of the World scandal in the UK will have an opinion on this (failure…). Maybe they are hanging on for dear life? Time to Revolve or Die?