I been playing around with Steamer 4 giving it a work out :) and so far all is good.
For 90% of the time I'll be using the Android app ... but I've an issue ... It don't seem to scrobble :(
... or have I missed a setting some where?
As long as Last.fm has been connected and enabled in Helium and you are using the same database in Helium Streamer it should work.
Please let us know if you have done this and still have problems.
... so far so good :)