It does seem that it's not activly developed or supported. I've never heard anyone from TAC or sales push it as a feature even though it can do some cool things. I think a great thing it can do it provide basic 'Air Monitor' capabilites in sites where you have limited or no APs.
The fact that it is still version 8.0 and copyright on the client says 2004-2014 says to me they are at least not updating it. I'll check with TAC if there is still support for this, or if there is anything needed on the server side to get speed test working.
I'll update if i hear back anything,
_ELiasz