Any advise on a UPnP Stack for Linux?

Hi,

I am working on a project which involves UPnP and will run on Linux.
Is anyone using a UPnP stack in a working project out there other than
the IGDs that I see?

I see a number of commercial stacks for linux, as well as the Intel
originated libupnp 1.2. Libupnp 1.2 looks fairly complete apart from
an implementation of device security. Has anyone used it for anything?
Has anyone used one of the commercial ones, and if so why?

As you can see, I'm trying to get a feel for whether people have found
a way of doing UPnP on linux that generally works well.

Any advise or shared experiences would be greatly appreciated.
Thanks in advance.

-Robin Barooah