To add to the posts about triples:
The Class of 2012 will not be over-enrolled, therefore the number of triples will be minimal and probably only go to those students who requested a triple.
For DorkAlert:
I'd suggest posting your question about Off-campus housing for transfer students to the Transfer Exchange section of the Hopkins Forums:
Board Message
You are more likely to get an answer there from current Hopkins students who went through the transfer process in the past and can provide you with ample advice and resources.