The Status Notification Specification is a D-Bus spec for what are
sometimes called "systray icons".  It lets applications create systray
icons using just D-Bus, rather than the mix of different things required
by the older spec.

The spec itself is here:

    http://www.notmart.org/misc/statusnotifieritem/index.html

As far as I know, only KDE currently implements this spec.  However,
nothing prevents it from being implemented in other desktops.

Attached are 2 files to implement the spec for Emacs:

* status.el, the basic implementation
* erc-status.el, adding an icon for ERC.  The icon blinks when someone
  pings you, and clicking it switches to the appropriate buffer.

I'd like to check these in to Emacs.  However, I was uncertain where to
locate them, so I thought I would post here first.

I also have a similar file, emms-status.el, to add an icon for EMMS; and
a few bits of elisp to add something similar for the calendar (plus
calls to notifications.el for appointments...).  I can send those along
if anybody cares.

Tom