import urllib2
import urllib
import BeautifulSoup

# "Obvious" constants
url = 'http://www.cepstral.com/cgi-bin/demos/weather'

# Here is the data that FireBug said we sent
postdict = {'city' : 'San Francisco',
                'demotype' : 'actual',
                'state' : 'CA',
                'voice' : 'David',
                'submit':'Synthesize the weather'}

# Encode it into HTTP form, blah de blah blah
postme = urllib.urlencode(postdict)

# Set up a request
req = urllib2.Request(url=url, data=postme)

# Send it...
fd = urllib2.urlopen(url, postme)
page = fd.read()

# Find the WAV
import re
regex = re.compile(r'href="(.*wav)"')
relative_url = regex.search(page).group(1)

# Make it absolute
import urlparse
absolut_wav = urlparse.urljoin(url, relative_url)
print absolut_wav

# on Linux, I could run 'mplayer' on the resulting .wav file, and then it would play.