First Yahoo! and now AOL have quit the enterprise IM game. This isn't so much a sign that enterprises are giving up on IM, or not taking to it, but rather that businesses are reluctant to pay for something they have been getting for free. Apparently identity management and logging aren't enough of a benefit to justify monthly fees for many companies. I think there's some big changes afoot in the enterprise messaging space and this is just one small sign of the turmoil.