The ZoomAir 11Mbps PC card is your basic 802.11b PC card that uses the Intersil Prism II chip set and has a non-detachable, unmovable antenna. The antenna is flat and won't interfere with the adjacent PC card slot, either above or below it.
Tip: The PCI version of the card comes as a separate PCI adapter and PC card, but the PC card has an SMA style connector with cabled antenna!
There's one "Link" LED on the antenna section, which shines steadily when the card detects a signal from another 802.11b station and blinks when it can't. The LED doesn't flicker to indicate network activity.
Setup and client management for the ZoomAir is similar to other PRISM II based cards, such as the SMC2632W and D-Link DWL-650, that use the Neesus client utility, so refer to either of those reviews if you need details.
(I found it interesting that the latest additions to the ZoomAir line, their USB Client adapter and IG-4150 Wireless Internet Gateway are re-branded ORiNOCO products. I think that makes Zoom the first company to have a product line based on both the Agere Systems and Intersil PRISM chipsets!)