Hi Resmyrranda,
What the "other guy" sees depends upon how you set up your chatroom. If you set it up "wide open" then they click on the link they enter in their name and ooVoo opens up the chatoom in their browser. You will reveive notification that some one has entered your room and can join them. You enter your own chatroom from within ooVoo (ACTIONS/ENTER MY VIDEO CHATROOM/).
If you set up your chatroom requiring your permission for people to enter, you will be asked if So-and-So can enter, and if you allow it ,they will be able to join.
Lastly, If you set up the room with password protection, they will be brought to a password entry screen. They will only be admitted if they enter the correct password.
Here is a video on chatrooms: http://www.oovoo.com/How-To-ooVoo/Video-Chat-Room.aspx
Best Regards,
ooVoo Dave