Magical Room and Bill Weasley

[a_rude_mechanical]

No: HPFGUIDX 53714

 I know this has been discussed previously, but I would like to hear 
 some thoughts on the room at Hogwarts that JK Rowling mentioned in 
 an interview that has "magical properties."  The room, as I 
 understand it, is mentioned in GoF, but we don't yet know its 
 importance.  
 
 I'm curious about the room at the end of the Great Hall that the 4 
 competitors of the Triwizard Tournament enter...I was re-reading 
 GoF, and Bill Weasley makes a comment on having been in the room 5 
 years previously.  Could this be the room Rowling mentioned?  And 
 what do you think its importance might be?  Does it have an  
importance at all?  Surely Bill's comment will be followed up 
 in a later book!
 
 And while we're on the subject of Bill Weasley, does anyone else 
 think he might play a larger role in the books to come?  When I re-
 read the fourth book, I just noticed how much he is mentioned and 
 how much fun he is.  Rowling connects him to Rita Skeeter, she goes 
 on and on about his long hair, his presence in the infirmary at the 
 end...am I going crazy, or does he stand out?
 
 I would love to hear your thoughts!!\
 
 Elisabeth