I've brought a little new treat for ya all... its funny to see how speedtest just adds a new security check (the referrer) and it ruins both cheating methods. But wait, they are not completely ruined, at least not the web based one.
As it has been already made public, I see no harm in posting the following guide:
If you want to get the monitur web page working again, just fake the referrer to speedtest.net as "http://cdn.speedtest.net/flash/speedtest.swf?v=330847"
For mortal people:
1) Install the refcontrol firefox add-on
2) Open the RefControl settings window, under tools
3) Click "Add site"
4) Site: speedtest.net
Custom:
http://cdn.speedtest.net/flash/speedtest.swf?v=330847
5) Click Ok
and you are all set, now you can use the web based faker again!