Make app a service/menu bar icon?

[geerlingguy]

Add a feature like Rivet, Dropbox, Xmarks for Safari, etc. - a menu bar icon that has the options for toggling file visibility.

Use NSStatusBar or NSStatusItem:

http://developer.apple.com/library/mac/#documentation/cocoa/reference/ApplicationKit/Classes/NSStatusBar_Class/Reference/Reference.html

http://developer.apple.com/library/mac/#documentation/cocoa/Conceptual/StatusBar/Tasks/creatingitems.html%23//apple_ref/doc/uid/20000996-BBCDAGHB

http://developer.apple.com/library/mac/#documentation/cocoa/Reference/ApplicationKit/Classes/NSStatusItem_Class/Reference/Reference.html%23//apple_ref/doc/uid/20000248