There’s an interesting mini-trend of rappers releasing protest songs in some of the North Africa countries to coincide with the street protests. El General (real name Hamada Ben Amor) in Tunisia became the most prominent when he released President, Your People Are Dying in the final days of the Ben Ali regime.
There are others in Libya and Egypt too, but overall the Tunisians seem to be doing the best stuff, including Psyco M.
Here are some of the ones I've come across so far:
El Général (Tunisia) President, Your People Are Dying
Psyco M (Tunisia) Jeu Politique 2011
Ibn Thabit (Libya) Poverty & Corruption
And last but not least, this one from Egypt - can't find a version I can embed into this site so you'll just have to click through on one of the links...