Hi Mario,
The 1200 series AP's do support WPA2. Have a look at the following;
The Cisco Aironet 1200AG Series has achieved National Institute of Standards and Technology (NIST) FIPS 140-2 level 2 validation and is in process for Common Criteria validation under the National Information Assurance Partnership (NIAP) program. The Cisco Aironet 1200 Series supports 802.11i, Wi-Fi Protected Access 2 (WPA2), WPA, and numerous Extensible Authentication Protocol (EAP) types. WPA and WPA2 are the Wi-Fi Alliance certifications for interoperable, standards-based wireless LAN security. These certifications support IEEE 802.1X for user-based authentication, Temporal Key Integrity Protocol (TKIP) for WPA encryption, and Advanced Encryption Standard (AES) for WPA2 encryption. These certifications help to ensure interoperability between Wi-Fi-certified wireless LAN devices from different manufacturers.
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_data_sheet09186a00800937a6.html
Q. What Cisco Aironet access points support WPA2 and AES?
A. The following Cisco Aironet autonomous and lightweight access points support WPA2 and AES: Cisco Aironet 1240AG Series, 1230AG Series, 1130AG Series and 1000 Series access points. Cisco Aironet 1100 Series, 1200 Series and 1300 Series 802.11g radios support WPA2 with a Cisco IOS Software upgrade via Cisco IOS Software Release 12.3(2)JA or later.
From this doc;
Cisco Wi-Fi Protected Access, WPA2 AND IEEE 802.11I
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_qanda_item0900aecd801e3e59.shtml
Cisco IOS Software Configuration Guide for Cisco Aironet Access Points, Cisco IOS Release 12.3(8)JA
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_configuration_guide_chapter09186a008060718c.html
Hope this helps!
Rob
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