Here's the best alternative; USB PC to PC Network Cable TCP/IP. No need to buy NIC.

Go to this site: http://www.usbgear.com/usa/item_166.html
They have one for $39.95



Part NO: usbg-300

Features :

USB PC TO PC Network Bridge Cable
This unique cable allows you to easily construct a network via USB port and share all the resources such as files, printers periperals equipment and more.
Overview
The USB PC to PC network Brige Cable provides a quick and wast solution to network up to 17 USB computers via hot Plug & Play technology without adding any Network Interface Cards.
It is suitable for small offices, home offices, mobile users, and network gamers. With the USB PC to PC Network Bridge Cable users can play multi-player games, share files,printers, peripherals equipment and more.
Support TCP/IP, NetBEUI, IPX/SPX protocols
Full NDIS Driver Implementation
No external power needed
Complaint with USB specification version 1.1
USB full speed connection
Support Windows 98
Hot PnP for easy use <

true, but you get what you pay for, ethernet is much faster. All depends how much data you need to transfer and how long you want to wait...

Ethernet is the way to go in my opinion, IF your laptop has an ethernet connection (most have them built in these days..)

estimated costs;
el ceapo pc card $ 20,--
utp cat5 shielded cross over cable $ 6,--

cheap and fastest solution.