Unfamiliar Technology: Google Maps Transit Layer (selected cities)
No colored bus lines are found, but there are clickable popups on the transit stops. Shows the next two departures, may or may not be hooked in to real-time transit info.
Enable under "More...transit"; Drag the little man for the "street view."
Here's a link to downtown SF, botttom of Market Street.
This one looks much more useful than the "Wikipedia" feature.
