Also the article says:
"no producer can risk engaging her, as it almost certainly will result in their work being banished as well. According to Azza there is no official prohibition against her or her work, but the results are all the same: it is impossible for her to find singing engagements on either on radio or national TV."

I think a lot of American artists would probably like to speak out on what's happening in Palestine but are fearful of the same thing. Interestingly American rap artist Immortal Technique seems to be taking the risk, however. He was the headline performer at a benefit for Gaza that was supposed to have been held in New York over the weekend. See the following link (not sure how to make this come out as a "link" you can click on, so you'll probably have to cut and paste into your address bar):

http://www.kabobfest.com/2009/01/art-activism-and-gaza-poets-and-hip-hop.html

I don't live anywhere near New York, so I don't know how it turned out. But I do know Immortal Technique has addressed the issue of Palestine before. Of course he knows his songs aren't going to get played on the radio anyway, so he's got nothing to lose. At any rate, if you haven't heard his song "The 4th Branch" I would recommend downloading it. It's mainly about lies told by the media, but there are several lines about Palestine. Also people have been posting messages on his blog in support of Palestine as well. See:

http://www.myspace.com/immortaltechnique

And finally this: a statement of solidarity with the people of Gaza was issued by Subcomandante Marcos of Mexico's EZLN (Zapatista Army of National Liberation). You can read it in full here:

http://zapagringo.blogspot.com/2009/01/solidarity-with-gaza-mexico-nyc.html

The point of all this, I guess, is to show the people of Gaza that they are not alone, that millions of people around the world are with you. Or as Marcos puts it:

"We don't know about you, but we Zapatistas from the EZLN, we know how important it is, in the middle of destruction and death, to hear some words of encouragement.

"I don't know how to explain it, but it turns out that yes, words from afar might not stop a bomb, but it's as if a crack were opened in the black room of death and a tiny ray of light slips in."