Just wrote a simple scrolling marquee screensaver with pygame. Bad thing, it runs in 640 x 480 display mode.
Image:

Konqi taken from Wormux.
Source:
#!/usr/bin/env python
bkg_image_filename = 'images/wormuxkonqi.png'
# Running in windowed mode
SCREEN_SIZE = (640, 480)
message = " KDragons coming soon... "
# Get functions needed
from random import randrange
import pygame
from pygame.locals import *
from sys import exit
pygame.init()
screen = pygame.display.set_mode(SCREEN_SIZE)
font = pygame.font.SysFont("freemono", 30);
text_surface = font.render(message, True, (0,255,0))
x = 0
y = ( SCREEN_SIZE[1] - text_surface.get_height() ) / 2
bkg = pygame.image.load(bkg_image_filename).convert()
while True:
for event in pygame.event.get():
if event.type == QUIT:
exit()
# set speed for scroll and change of y axis position
x-=5
if x < -text_surface.get_width():
x = SCREEN_SIZE[0]
y = randrange(100,450,20)
# konqi scrolls opposite direction to text
screen.blit(bkg, (-x,y/2))
screen.blit(text_surface, (x,y))
pygame.display.update()
screen.fill((0,0,0))