Significant Sevens

[Trish]

No: HPFGUIDX 137292

I have been thinking a lot about seven. Seven books. Seven horcruxes. 
JKR's interview stating the importance of Ginny being the seventh 
daughter of the seventh daughter and having magic powerful..that we 
will see in the seventh book and, I was wondering, what are the other 
significant sevens?? Can we list them? 
I watch the tv show "Lost" and anyone who does knows the significance 
of 'the numbers', (there is a website devoted to it!)But is 'seven' 
very important in HP? Can it unlock any secrets? Does Severus have any 
of the same roots as Seven? Maybe not but, could we look at this 
closer and list anything we can think of that 'may' be significant. 

Trish
--who thinks that maybe the seventh book will be released on 07-07-07!!