Living in Europe, the mobile is my daily companion and so are my needs to connect remotely to my office. All the messages I read about the support of IrDA have been negative, telling me that the IrDA is not strategic any more for Apple anyway.
What a surprise when I did a new installation with the Mac OS X 10.1.1 CD coming with the new PbTi 550MHz: IT WORKS! I can choose the infrared connection using the Network Preferences and just by copying the Nokia modem scripts from Mac OS 9 I'm able to connect remotly to my office again. One big step to MacOS X in my daily business for me.
[Editor's note: I'm not sure if this is news or not, but everything I've seen has certainly indicated that IrDA was not supported on the newer Macs in OS X.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=2001112014393125