So..... got an SMS from the service center today and.... *DRUM ROLL*

I got my N900 back repaired and more!!!!
- They replaced the speaker, which is what originally took me there
- Replaced the whole screen case and outside screen (my screen had a NASTY scratch on it)
- Replaced the keyboard keymat (it was totally worn and paint had come off in several keys)
- Replaced the battery connector (it was oxidized)

All of this under warranty for a 22 month old device - I am really happy.

Just adding one (not so small...) detail. They are NOT a Nokia service center - they are a sub-contracted company that handles the repairs for Nokia and Samsung on this area and I went straight to them, not via any Nokia shop or Nokia repair center.