Well,
Apple phased out IR from Desktops and Towers some time ago.
I think that this came about because people were not using it and it cost a lot for something that was not used.
All apple portables (except for modern day iBooks) have it.
IR is functional in OS X.
At least modem-IR works. Apple has made drivers for ericsson, nokia and motorola IR enabled phones to allow mobile users to connect to the internet with their mobile phone (via IR I believe since data cables for those phones are neither USB nor Mini-DIN 8 serial which no "new" macs have any more).
We just have to test the IR in OS X.
I dont think that apple will phase out IR until it can find a way to have mac and non mac devices communicate in some other way.
Perhaps Bluetooth technology will take care of this, but bluetooth is quite new and will not be "standard" on macs or PCs for some time.
Also another noteworthy point, have you seen PC desktops/towers with IR latelly ? Nope, I havent. Just laptop models. So apple aint alone in this
Admiral