Cisco announced the end of life and end of sale for the Cisco 526 Wireless Express Mobility Controller. You probably didn't even know Cisco had a controller 526 and 500 series APs, did you? This product line was an attempt to market to small price point customers who wanted a 
controller based product with enterprise features. The 526 / 500 line had no compatibility between the 2100 / 4400 / 5500 / WiSM product line. So you couldn't take a 500 series AP and have it join a 4400 series controller. I mentioned when Cisco released this, it was doomed from the start. I didn't see this product taking hold in the market.
Title: End-of-Sale and End-of-Life Announcement for the Cisco 526 Wireless Express Mobility Controller [Cisco 500 Series Wireless Express Mobility Controllers]
Url: http://www.cisco.com/en/US/prod/collateral/wireless/ps7306/ps7320/ps7339/end_of_life_c51-568040.html
Description: Cisco announces the end-of-sale and end-of life dates for the Cisco 526 Wireless Express Mobility Controller. The last day to order the affected product(s) is June 1, 2010. Customers with active service contracts will continue to receive support from the Cisco Technical Assistance Center (TAC) as shown in Table 1 of the EoL bulletin. Table 1 describes the end-of-life milestones, definitions, and dates for the affected product(s). Table 2 lists the product part numbers affected by this announcement. For customers with active and paid service and support contracts, support will be available until the termination date of the contract, even if this date exceeds the Last Date of Support shown in Table 1.
Date: 2009-12-01 07:11:34.0
Title: End-of-Sale and End-of-Life Announcement for the Cisco 500 Series Wireless Express Access Points [Cisco 500 Series Wireless Express Mobility Controllers]
Url: http://www.cisco.com/en/US/partner/prod/collateral/wireless/ps7306/ps7320/end_of_life_c51-568039.html
Description: Cisco announces the end-of-sale and end-of life dates for the Cisco 500 Series Wireless Express Access Points. The last day to order the affected product(s) is June 1, 2010. Customers with active service contracts will continue to receive support from the Cisco Technical Assistance Center (TAC) as shown in Table 1 of the EoL bulletin. Table 1 describes the end-of-life milestones, definitions, and dates for the affected product(s). Table 2 lists the product part numbers affected by this announcement. For customers with active and paid service and support contracts, support will be available until the termination date of the contract, even if this date exceeds the Last Date of Support shown in Table 1.
Date: 2009-12-01 07:11:32.0