For those of you still using HIS 2006 in your environments, please be aware that HIS 2006 entered the Extended Support phase of its lifecycle this past Tuesday (April 10, 2012).
When a product is in Extended Support, it means that Microsoft Support still provides support, but new hotfixes will no longer be created for any new issues that are identified as bugs. In order to get new hotfixes, you would need to purchase an extended support contract.
The HIS 2006 lifecycle is available at http://support.microsoft.com/lifecycle/?p1=11973.
If you are using HIS 2006 and have not starting migration planning, now would be a good time to start.