[style guide] tabpanel questions

Reference:
http://dev.aol.com/dhtml_style_guide#tabpanel

Q1: If the focus goes to the tab and not into the associated  
tabpanel, how
does the user, from the keyboard, move the focus into the active  
tabpanel
from the active tab?

Q2: The style guide presently discusses how a user would activate a  
'delete'
operation on a tab (and its associated tabpanel) via hotkey or  
context menu.
Do you have a user-experience feature for how the user would discover  
that
a given tab can be deleted?  Or markup/DOM/API concept?

Al