i would totes count novel-length fic, but that's just me.
also: valid points on the name-change there. i think if it's going to be important for anyone in the Weasleys it would be Molly, but it's not like she's hasn't just adopted everyone anyway.
it would, however, be awesome, if Harry had changed his name to Weasley. admittedly, he wouldn't as blahblah fathers name blahblah family line, but still. or Ginny stayed a Weasley. actually, i can see her being more stubborn about staying a Weasley than Hermione a Granger, for some reason. hmmm.