Since today you can install ePomodoro directly using the provided update site! And naturally update it using the Eclipse function Check for Update.
You can add this Update Site: http://repos.mornati.net/eclipse/ and select ePomodoro.
Should work, even if at the moment you get a message saying the content is not signed, bla, bla, bla. I'll fix it next days, but let me know if you can install ePomodoro without problems.