If you rely on Service Bus for Windows Server 1.1 to do anything, you might want to start thinking about replacing it. Microsoft announced in a blog post today that they're going to be discontinuing support for the service in a year - the cutoff date being January 9, 2018.
The cutting of support for the service came "after a careful analysis of market and community needs, trends, and considering what [Microsoft's] true technology strengths are." It accompanied an announcement that the future of cloud computing is in hybrid technology, and a successor to Windows Server 1.1 will not be immediately available.
The exact wording in the blog post is that Microsoft will be discontinuing "mainstream support" in January - not necessarily constituting a full stop. While it's certainly not advisable to rely on the service as it goes into obsolescence, it'll be interesting to see if anything else happens with it after 2018.