Its great working. After logging on into pluto:9000, you can do the same as with the original slimserver software. The version on pluto is not very up to date, but seems to work with a few crashes doing exotic stuff.
The only disadvantage is the difference between the original install. Any hint you get from the forums does not apply to the pluto install (config files etc.).
You have to find it yourself...
Anyway: get one of the Rokus, its great fun.
Honestly, its one of the first things with pluto for me that worked without trying hours...