I had trouble getting my iSight cam to work in the chat rooms but after much fiddling, it's up and running! A few other Mac users I have spoken to have had the same trouble, so for the benefit of all SH maccies, here's how to do it:
1. enter a chatroom
2. put mouse arrow in left hand vid window
3. control-click and choose 'settings' from menu
4. In the dialog box that comes up, click the 'allow' radio button and tick the 'save' checkbox
5. On the row of icons at the bottom of the dialog box, choose the right hand cam icon
6. from the drop down menu, choose 'USB class video' then click the close button
7. it should now work!
Good luck!!
