Allow resizing and hiding of sidebar
It would be nice to be able to click/drag the sidebar (where channels are) and resize it/ hide it if desired.
Resizing it and having a channel name abbreviated with ... could make sense;
ex: Town Square once it starts getting cut off would become Tow... (depending on how small you make the sidebar). Then if you go over far enough it snaps into a hidden position
With the limited space on handhelds I think this will be highly desired.
Dave Hill commented