libgvfscommon-dev 1.6.0+git20100414-0ubuntu1 (amd64 binary) in ubuntu lucid

 gvfs is a userspace virtual filesystem where mount runs as a separate
 processes which you talk to via D-Bus. It also contains a gio module
 that seamlessly adds gvfs support to all applications using the gio
 API. It also supports exposing the gvfs mounts to non-gio applications
 using fuse.
 .
 This package contains the libgvfscommon development files, needed to
 build new backends that make use of the same functions.