MAPS is advisory. AOL takes direct effect.
\r\n\r\nWith MAPS, you can query to see if an IP is in a dialup range, and then decide what you're going to do about it, including deciding that you're going to give it lower priority, scan it, block it, etc. AOL is taking that option away by simply blindly blocking all mail.
\r\n\r\nI'm strongly inclined to suggest that the independents start refusing AOL mail in retaliation.