I have the most recent version (if I remember correctly) yesterday i was updating plugins - starting with the inactive. First was Akismet update then All in one SEO, then Contact Form 7 and then twitter friendly links. After twitter friendly links some thing happened. The update process did not "complete" and I found myself with a blank screen.
I used my ftp to remove all 3 plugins and cleared my cache - today my dashboard is still invisible - blog is visible, login screen is visible too. Once I'm in, nothing.
I searched the forums and don't see an alternate solution besides removing the offending plugin.