This appears to be the sequel to AP's earlier efforts to charge for clipped content on the Web. The first go-round resulted in a "blogger strike," in which authors around the Web vowed to use alternatives to AP content, as well as a bloggers' "civil disobedience movement" in which authors continued to take content from the AP without permission.
I don't know that either was terribly effective, and/or whether they canceled one another out. What I do know is that the AP is determined to make an issue of how people use their content online. No word yet on how they're going to deal with fair-use issues.
As an interesting counterpoint to the last installment of AP's drive, check out this article
from the National Review, of all places (not exactly a bastion of liberal copy-left pundits).