Well, gSpotify was just something I put together one weekend to see if I could make it work. Code is a mess and it crashes constantly.
But the despotify team made their own maemo client afterwards, it's in the SVN. Just uncomment two lines in the makefile to compile it. Only has basic search and play though, but it seems more stable.
I'm thinking about making a proper client out of it when I get the time.