Proxim AP-4000

I'm playing with our first Proxim AP-4000 wireless access point today. We've used the AP-1000 and AP-2000 units in the past, but so far, I vastly prefer the 4000. This unit is much smaller than the previous units, and it'll be a lot easier to mount up in drop ceilings. They've also made it a little more theft-resistant, by no longer having removable PCMCIA cards. Now I need to get the old junker laptop they've stuck me with working, so I can test the 802.11a functionality, as I've never used that protocol before, and my iPaq only speaks 802.11b.