Also, I found this website:
http://www.livecountdown.com/countdo...k/default.aspx
It seems like it would be good.
Here is a test one I made:
[flash width=500 height=400:130455f713]http://www.livecountdown.com/countdownclock/countdown.aspx?id=5968[/flash:130455f713]
I can't seem to see that in my browser so I am not sure whats wrong, you can view it by going to:
Flash Countdown.