Why I'm not buying a premium subscription yet

Library in spotify
There are a few things I'm missing on spotify as of today which exist in other streaming services and is keeping me from buying a premium subscription. The first is a library, where you can add tracks, albums, artist, radio channels and playlists. If you look to Rhapsody, this exists here and is working very well. If you're planning to get this into equipment such as Squeezebox and Sonos, which has very small displays, this is very useful to find stored music.

Symbian
The second thing is a Symbian client with the possibility for offline play(or better, spotify with offline support for any DRM-compliant device). Even though the iPhone is greatly hyped the majority of the smart phone share is Symbian. (http://en.wikipedia.org/wiki/Smartphone).
I know it's hard to program, but it's not THAT hard.. (I'll volunteer as a beta tester) ;)

Regards,
Svend