Thanks :) I found something that should work on the N8: bambuser.com
The only link I know for the ustream app of is on the main website:
http://www.ustream.tv/mobile/broadcaster
I did a little research and found tips to change the date of the phone to one that would within the range of the certificate. But even then, it might not work. It's a shame, because the quality seems to be higher and the API is public.
In any case, thanks a lot! I appreciate it.