Support for VSS (Visual Source Safe)

JIRA is an amazing tool. I'm pushing hard to migrate our defect/features system to JIRA (we're mostly developing C#/C++ solutions), but there's a blocker point : support for Visual SourceSafe aka VSS (switching cost for the VCM won't be accepted in my customer current context; I guess it's the same for many of .net based applications, although Subversion is gaining momentum).

Are there plan to implement support of VSS ?