You will need a wireless router for one of the following standards:
Bandwidth is not an issue with just two computers.
802.11a - 54mbs bandwidth in 5ghz band. New technology, more expensive, conflicts are less frequent unless you have the new cordless phones that operate in that range.
802.11b 11mbs bandwidth in 2.4mhz band. Most widely used. Equipment is low in cost because it has been in service for some time. Possible conflict with cordless phones and other devices that use this band.
802.11g - 54mbs bandwidth in 2.4ghz band. New technology, not as expensive as 802.11b but is in the band that has possibility for conflict with cordless phones.
These are avaible with or without 4port switches. I use Linksys, www.linksys.com. Their systems work are easy to configure and they have excellent tech support.
You will need also need two wireless adapters for the laptops. These are avaible wither in pcmcia or usb.
Good Luck Lee