It's also a big question as to what you can do to save your starred items moving forward.
Any tag/folder in GReader can be exported as an RSS feed. Go to "Reader Settings" > "Folders and Tags" and click on the RSS icon to make it public, then click "View public page" and on that page there's a link to its Atom feed.
Any tag/folder in GReader can be exported as an RSS feed. Go to "Reader Settings" > "Folders and Tags" and click on the RSS icon to make it public, then click "View public page" and on that page there's a link to its Atom feed.
Then you can import it to any other reader.