I'd like the possibility to group parts of my collection in the collection list. I've been photoshopping to show what I mean, see the picture(clickable) below:


The arrows at the end of the line are clickable to expand or collapse the group.
It would also be nice to see this grouping in the online collection.

I like it. It's got my vote.

I would love to group my DVDs as well.  I was going to see if it was an added feature yet, but guess not.  I love love to group the vengence series (Oldboy, etc) together or maybe all my zombies movies, etc.  I could do it be creating "boxsets" for them, but namable dividers/seperations/sections would be better.