802.11 is an open standard. I can't think of a single reason why there would be a problem connecting.
Don't support Airport networking? Maybe there is some miswording, but as you stated this, no that jsut doesn't seem correct at all. If they were talking about Appletalk, I could see that, but I don't think that is what anyone meant.
I think youa re asking if the iBooks and the iMacs can connect to other 802.11 AP's, like the Cisco AreoPort. I would need to have someone give me a reason why not.
Try this for fun: ask them if you can connect you wireless PC laptop to the AeroPort. I'll bet they'll say yes. In my experience, many IT people don't know Macs and they speak without knowing.
Bottom line, I don't see a reason why you would have any probelms connecting.