Automatic friends groups
Short, concise description of the idea
Have some friends groups available by default to all/paid users. Some ideas include "lj specific" (lj_*, news etc), "RSS feeds", "communities" ...
Full description of the idea
The system wide groups would filter against a person's friends list. For example, if I viewed my friends list with an "RSS feeds" filter, it would only show the friends on my list that are RSS feeds. Similarly, a "communities" filter would show only my friends that are communities. Maybe there could also be a user defined setup that allows users to create filters based on other account metadata (eg a "Location:Australia" group that filters my friends list based on their location)
An ordered list of benefits
An ordered list of problems/issues involved
An organized list, or a few short paragraphs detailing suggestions for implementation