BizTalk 2010 is officially in Extended Support
So what does this mean? I'll tell you.
If you need help, our support teams are here and will continue to help, until January 2021. So, continue to open those support cases. Here's the 'but'. Cumulative Update 9 is the last update; there are no more bug fixes or updates. There will continue to be security fixes, which are rare in our BizTalk world. Here's some online reading:
BizTalk Server Product Lifecycle on the TechNet Wiki
For those still using BizTalk Server 2006 and 2006 R2, it's time to upgrade. Extended support ends July 2016. BizTalk Server supported upgrade paths lists the upgrade paths and more.