Welcome to the world of Cisco Wireless, then! There are several resources available for getting started:

Cisco Wireless Homepage

http://www.cisco.com/en/US/products/hw/wireless/index.html

Cisco Access Point Homepage

http://www.cisco.com/en/US/products/ps5678/Products_Sub_Category_Home.html

I'll give you a brief rundown of Cisco's different AP models and their uses:

1130 Series - An 802.11a/g AP that is designed for indoor use. It has integrated antennas, no option for externals.

1240 Series - An 802.11a/g AP that is ruggedized for extreme temperatures/environments. It is still designed for indoor use. It has no integrated antennas, so you need to purchase antennas to use this.

1140/1250 Series - These resemble the above APs but have 802.11n Draft 2.0 capabilities.

1300 Series - An 802.11g Bridge that can also act as an AP. Designed for outdoor use. Can be purchased with either integrated or non-integrated antennas.

1400 Series - An 802.11a Bridge, designed for outdoor use. Can be purchased with either integrated or non-integrated antennas.

1500 Series - "Mesh" access points that use the 802.11g radio for client access and the 802.11a radio to backhaul back to another Mesh AP. Designed for outdoor use to cover large campuses and parking lots. Does not have integrated antennas.

Cisco Wireless LAN Controllers

http://www.cisco.com/en/US/products/ps6302/Products_Sub_Category_Home.html

This is an entire subject in itself. Most of the above APs can run in either "Lightweight" or "Autonomous" mode. Autonomous means that they act as any other AP, they are individually configured and place traffic directly on the LAN. Lightweight APs receive their configurations from a controller and also tunnel all traffic back through that controller. This offers a centralized management platform and also allows for aggregated client and radio information.

Whew, that's a lot! Hopefully this gets you started. Don't hesitate to ask specific questions as you start reading around.

Jeff