Not too much in the market we're in. We do have other plans but the 2.4G band is nice because it's world-wide (more or less and the less part is easily manageable).
I haven't looked seriously at their offerings. I should. IRDA? Why not BlueTooth. ;-) Disclaimer: I *hate* BlueTooth.
Our big seller into the rental market is configuration over Ethernet. It makes the thing a *lot* easier to set up than the arcane menus on the tiny LCD.
We used the BTR800 (I think that's the model) in the high-end sports product line until they bit the bullet and decided to do the engineering themselves (before my time). I still see them in the older units that come back each year for service.
I never ran into this problem when I worked for IBM. Everything was specified down to the smallest detail[*]. The workbooks were something to behold (easily tens of man-years in some of them).
[*] with the exception for the first generation crypto coprocessor key management - they didn't know what they wanted, just how it was to work.