.su check (from habrahabr.ru)

check.py

#!/usr/bin/env python

import string
import urllib

l = string.letters[:26] + string.digits

url = 'http://www.reg.ru/newdomain/check_available?domain=%s%s.su'
get = lambda y, x: urllib.urlopen(url % (y, x)).read()

print ' ', ' '.join(l)
for y in l:
    print ' '.join([y] + [' ' if 'unavail' in get(y, x) else '+' for x in l] + [y])
print ' ', ' '.join(l)