My recent blog articles referenced slides I built and presented at a Bluesnet Network Advisory Group meeting in Santa Barbara, CA. I obtained permission to post PDF versions of the Cisco slides (with the exception of some Site Survey slides). Together, my slides plus the Cisco slides make up a pretty solid two day introductory course in 802.11 wireless (WLAN).
Here is an ordered list of topics and links to the PDF'd presentations.
And here are links to my prior blogs about this (which mostly point to the PDFs).