Someone

from plugin import *
from twisted.internet import task
import pysvn

currentRev = None
client = pysvn.Client()

reposurl = 'http://libburn-svn.pykix.org/'

def checkForNewCommit():
  global currentRev
  try:
    newrev = client.log(reposurl,
                 pysvn.Revision(pysvn.opt_revision_kind.head), 
                 pysvn.Revision(pysvn.opt_revision_kind.head)
           )[0]
    revno = newrev['revision'].number
    if revno <> currentRev:
      if currentRev is not None:
        desc = newrev['message'].strip().replace('\n',' / ')
        say("New commit (r%s) by %s: %s" % (
             revno, newrev['author'], desc))
      currentRev = revno
  except:
    pass


l = task.LoopingCall(checkForNewCommit)
l.start(300.0)