Test for and adapt to: -nw

[Tim Johnson]

Using emacs 23~ on linux. In some cases it would be preferable for me to
use the -nw (do not use X) initialization option.

1)Is there an emacs function to test for X communication?
 example: (using-X-p)
2)Are there any color themes composed especially for emacs?

I would like to do something like this in .emacs:
(if (using-X-p)
  (color-theme-gnome)     ;; from color-theme.el
        (nw-color-theme-gnome)) ;; from where ??

3)Is there something like an .Xresources file for a non-X emacs?

thanks
-- 
Tim 
tim at johnsons-web.com or akwebsoft.com
http://www.akwebsoft.com