Modest Mouse has a new collection of B-sides from their past two releases (Good News for People Who Love Bad News and We Were Dead Before the Ship Even Sank). On their web site, you can listen to the tracks by clicking a very prominent 'Launch Player' link on the top of the homepage.
When I first used the Player, I had trouble accessing the songs but was quickly presented a popup indicating that the service was temporarily unavailable. What I liked is that when the popup opened, everything else in the window (behind the popup) became blurry. This method of focusing the user's attention on one window, though not revolutionary (it's used on both the Mac and Windows OS), is helpful and takes the cognitive burden off users.