Got this search from Google:
http://www.google.com/search?hl=en&q=Blackberry+curve+8520+smartphone+ubuntu+lin\
ux&btnG=Search&aq=f&aqi=&aql=&oq=&gs_rfai=
http://www.google.com/linux?hl=en&q=Blackberry+curve+8520+smartphone+ubuntu+linu\
x&btnG=Search
If you search in Synaptic for Blackberry you'll find some help, too.