Org Charts using Linux?

[Joe]

Hi.  I want to make a fairly simple organization chart using Linux.
I am looking for a tool that makes this easy to do.  I do not have time 
to learn a full blown graphics program to do this (I'm clueless about gimp).

I need to make boxes around names, etc. and have a few lines of text in 
each box.
I would like lines to some boxes and arrows to others.  I would also 
like to be able to add some dashed lines across the page and some other 
annotations and arrows outside the boxes.

I have not done this before (even on Windoze).

Any suggestions would be appreciated.

Joe

-- 
"I hope we shall crush in its birth the aristocracy of our monied corporations which dare already to challenge our government to a trial of strength, and bid defiance to the laws our country." -- Thomas Jefferson, 1816