Longer term I think it would make sense to draw the line somewhere and require that support for 3rd party services such as Flickr be provided through "iMedia plugins" of some kind. I wonder if this is too much to take on for the 3.0 iMedia release?
The void of leadership problem is one reason, but also to take pressure off the core iMedia team to keep so much code up to date. What happens when Picasa support comes along (as was recently suggested)? Pinboard? Etc.
I also have a personal interest in keeping core iMedia "lean" because I don't take advantage of all the parsers that are included in the core project. For this reason I actually tweak my fork of iMedia to avoid building or including the Flickr parser.
Daniel