t.py

# If you've just missed your 12345th tweet..
# Getting it, the Python one-line way ^^
# By myfreeweb <[email protected]>.
# Follow me on Twitter: @myfreeweb in English, @myfreeweb_ru in Russian.
import json
import urllib2
# Imports don't count!

# We get 12344th tweet because Python counts from 0 and Twitter - from 1. Twitter loves humans :D
print json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=200').read())[json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=2').read())[0]['user']['statuses_count']-12344]

# Note the "count=2" in the second request. Twitter returns nothing when you pass it "count=1".
# Stupid Ruby? Stupid Rails? Or stupid Twitter developers?? No, maybe they just love humans way too much...

# We need to do 2 requests only because I wanted to do it in one line. Smth like this is possible:
spam = json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=200').read())
print spam[spam[0]['user']['statuses_count']-12344]

# But that's a tweet dict. We want just text, right?
print json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=200').read())[json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=2').read())[0]['user']['statuses_count']-12344]['text']

# Now let's use the force...
print (lambda a: a[a[0]['user']['statuses_count']-12344]['text'])(json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=200').read()))

# It can do a better thing: open it in your browser.
# So copy this (don't forget the imports), paste to the interactive python shell, replace the username and enjoy...
import webbrowser
webbrowser.open('http://twitter.com/myfreeweb/status/' + (lambda a: a[a[0]['user']['statuses_count']-12344]['id'])(json.loads(urllib2.urlopen('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=myfreeweb&count=200').read())))

# Yeah, Python can do it with a single line.