Short, concise description of the idea
Allow a journal to have multiple "subjournals" each containing a subset of the journal. Any journal entry may also be marked to appear in any set of subjournals. Each subjournal would have its own page, and could be individually "friended".
Full description of the idea
A number of people have multiple journals for various aspects of their life, perhaps one for trivia and test results, another for geek stuff, or whatever. It would be convenient to allow, instead, the user to define several "subjournals" within a single journal. Each subjournal would be a subset of the journal, and each would have its own page. The user could set any entry to appear in any combination of subjournals. The root journal would always contain all entries. Any subjournal should be individually friendable by others, and only entries in that subjournal should appear on the friends page. Friending a subjournal is equivalent to friending a user for all other aspects of friending. Subjournals and entry protection are orthogonal concepts, and each should not affect the other. The ability to create and use subjournals should be available to everyone. The ability to friend subjournals, however, might be restricted to paying users. An example: I define a subjournal called "software", where I write stuff about software. The subjournal would have its own page. People could friend "ashley_y:software" if they just wanted to read about my software stuff. Or they could friend my root journal, "ashley_y", if they wanted to read all my stuff.
An ordered list of benefits
An ordered list of problems/issues involved
An organized list, or a few short paragraphs detailing suggestions for implementation