I find cool that Google Reader mark as readed posts older than 30 days, specially for News websites. But sometimes I find some Feed so interesting, and without a heavy load of posts, that I prefer read all post since the begin. By example, some website has a news feed that, since the creation (more or less 2 years), generated 30-40 posts. I want to read (and save) all, but Google Reader will show only the last 30 days posts...
That is just one example, I want to workaround that limitation...
The only [ugly] idea that I've got is mark with star, but it will cause another problems...
Someone can help?