I know it's not really the point but the N9 has a Facebook / Twitter client built in. There's a few Spotify clients already for Maemo (what the N9 is based on)

I know it's not really the point but the N9 has a Facebook / Twitter client built in. There's a few Spotify clients already for Maemo (what the N9 is based on) so I expect there to be at least one before the N9 launches.