Al Jazeera has great footage of what's happening in Tunisia. Here's a screen capture of a soldier shaking hands with protesters over the razor-wire. Purely anecdotal, and in isolation it doesn't mean much. But a sign of trouble for President Ben Ali. If he does get pushed out, images like this will be illustration why the protestors won.
UPDATE at 9:10 am. Here's a collection of amateur footage of today's protests. AP is reporting that protesters managed to climb onto the roof of the Interior Ministry (that is, the ministry charged with suppressing these kinds of street revolts) and the cops are responding with tear gas (rather than live rounds, which in ordinary times would be the first choice for stopping citizens from overrunning such an important symbol of government power).