You can use this link http://www.cisco.com/kobayashi/bugs/bugs.html to lookup the status of Cisco software bugs. (Requires CCO Login)
You can use this link to view estimated software release dates: http://www.cisco.com/warp/customer/620/ios_12_0s.shtml
Query your Cisco TAC case(s) by clicking here or Open one too
Information on upgrading CiscoPRO routers can be found here (Requires CCO Login)
The IOS Upgrade Planner can be quickly found here