Laptops :: Whose usb PCMCIA card for an ancient laptop?

Anyone have recommendations on whose USB PCMCIA cards are known to work reliably with DSL on something like an ancient Toshiba 2155CDS (486DX/75) machine? I only need it for an additional serial port and a memory card reader.

Although if one would work with a WiFi dongle I might consider that as well. My current wifi card (netgear 401) works but it's only 802.11b. I'm looking to use this as a wardriving rig on my boat for finding wifi access points. So being able to find 802.11g is probably work adding. That and the MA401 doesn't have external antenna support.

original here.