can't you use google reader for this? Just make up some unguessable name for each group. No one could find the shared links unless they know the tagname. (Pr

can't you use google reader for this? Just make up some unguessable name for each group. No one could find the shared links unless they know the tagname. (Pretty sure, not 100%). You can get anything into google reader. For instance you see something shareable online, then just use google notebook to save it to the appropriate tag.