what do you call the black bar at the bottom of the Honeycomb interface?
To answer your question on what the 'black bar' is at the bottom of the screen - it appears to be called the System Bar.  I thought it was the Notification Bar but apparently that is part of the System Bar.

Here are several links that I found in my search:

Android 3.0 Highlights from Android Developer site

TalkAndroid.com

Esato.com

PhoneArena.com

StackOverflow Question where someone called it a 'System Bar'