I wouldn't know this from experience as my wife is the Mac OS user, but just recently I read that there is a Safari extension that attempts to restore this functionality.
»www.red-sweater.com/blog/2624/su ··· xtension
Apparently it has some problems (namely with websites that have multiple feeds) but it might help you out.--
"The counsel of fools is all the more dangerous the more of them there are." -Ólafr Höskuldsson