I hope Digg Reader will be simple and usable product, because there aren't many quality replacements for Google Reader. I have to say that I transitioned successfully from Reader to Gwene (RSS/Atom to Usenet News gateway) so I can read articles in any Usenet reader (I use new Opera Mail). Unfortunately AFAIK Gwene doesn't support import from Google Reader, but that shouldn't become an obstacle for people with modest amount of subscriptions.