yes, there's no system tray.
On the Menu bar (the top bar) there's 3 icons (for sound volume, monitor settings and a clock). Different applications use this space to add menus with shorcuts to apps, or extra control panels; and some other applications use the dock (that allows animated icons to show activity, post menus, show the amount of incoming emails (as Mail, the famous mail client by Apple). Other icons show the activity with a small progress bar, as Photoshop 7 when is busy openning a file, or Roxio Toast (a cd burn app) when is burning a CD with your favorite songs (for example, a compilation of Sheryl Crow songs).
The only 'task' feature i miss on OSX is the 'showing names' as the Windows taskbar (for example a button that shows the opened page in Internet Explorer)