I was wondering about the Weyburn status, too, so I emailed the UCLA housing office... they said:
Thank you for using Ask Housing.
The Weyburn lottery pool consists of 570 applicants (and is growing). If you weren't guaranteed housing by the Graduate Department. You are consider a Lottery applicants. A Lottery applicants are not guaranteed housing. Housing is offered to lottery applicants based on space availability. A limited number of lottery applicants are offered housing each academic year. Housing offer or wait list status will be e-mailed to lottery applicants by August.
UCLA Housing Services
I don't know how many spots are available, but this email made me feel like I should start thinking of alternatives. The thing is, when I had talked to an admissions officer back in March, they made it sound like I (not just me but this year's incoming law students) don't have to worry about securing on-campus housing.
A bit confusing... wish we could know by June. If anyone else has any other info, I'd be interested to know