I didn't notice when this feature landed on Google Reader, but I like that they added it:The option to hide the feeds list in Google Reader just got a lot more discoverable. There's now an arrow in the splitter to do that. (before it was just a keyboard shortcut: "U"). This allows you to see more of your feeds when you're reading stuff.
On that note, I remember something I read in Signal vs Noise:
Will Shipley (of Delicious Monster) said:
This is all your app is: a collection of tiny detailsAs long as you don't forget about the big picture, I couldn't agree more.
(Minor edits on construction and some typographical errors)