random_imgur.py

import os, random, string, sys, urllib2

num_pics = 1
if len(sys.argv) > 1:
    num_pics = int(sys.argv[1])

while num_pics > 0:
    name = ''.join(random.sample(string.letters+string.digits, 5)) + '.jpg'
    img = urllib2.urlopen("http://i.imgur.com/" + name).read()
    if len(img) != 503: # 'image not found' is 503 bytes
        num_pics -= 1
        print "http://i.imgur.com/"+ name