Users should be able to a) change the name of the
channel title, b) add a note about the channel itself
("I know this person, I hate this feed, this channel is
borked"), c) insert the feed's email address), and so
Likewise, item specific preferences like a) how many
items to display per channel, b) how soon items should
expire, c) search terms related to the channel, etc.,
should be applicable on a global and per-channel basis.
Technically, all of the above is possible now. The API
is there, there's just no end-user interface for it.
Shouldn't take too long to do.