One suggestion would be Linksys. You can get the WAP11 (Access Point, just over $100) and the WPC11 (PCMCIA card, under $60). You can find almost anything on both of them HERE.
Make sure you install the drivers from the CD before you insert the PCMCIA card. It's basically plug and play and will auto detect to sync up.
The speed of your connection and data transfer between the 2 depends on the distance you are. This is a basic breakdown of distance to speed ratio (from the WAP11 specs).
50M (164 ft.) @ 11 Mbps
80M (262 ft.) @ 5.5 Mbps
120M (393 ft.) @ 2 Mbps
150M (492 ft.) @ 1 Mpbs
Some things may cause problems such as GHZ range cordless phones in the building.
It's really simple as I said it will auto detect. You just plug the access point into an active LAN connection (and it's power cable) and install the drivers in the notebook, then insert the PCMCIA card. It should sync up fine. Some connections require ICS (internet connection sharing) which you install a second network card in the host computer, right click your internet connection/properties and enable ICS (depending on OS). Then you would hook up the access point off the second network card in the host computer and it will auto detect the same way as long as the host is online. That's just a quick and dirty basics off the top of my head, nothing to give IT classes on