What don't we expected from the Dursleys?

[Liz]

No: HPFGUIDX 46294

Here is a quote from that list of things JKR has said about book five 
that is on many website:

"The Dursleys are in the next book, and there's stuff coming with 
them that people might not expect."

There's been a lot of talk in HPFGU semi-recently about the idea that 
Petunia or Dudley could be a witch/wizard.  That's only one idea of 
something unexpected.  We should try to brainstorm some other 
theories.  I have none of my own at the moment; it's late and I need 
to go to bed.  But I wanted to see if anyone else had come up with 
something.

Thanks,
Lizbot