I'd imagine you're only on the waitlist for up to 6 months (but could be wrong). Now there have been another set of interviews this will probably form a new waitlist (presuming you're from the UK) otherwise the waitlist would be continually growing from leftovers of the previous interview sessions who may have found another job by the time their called upon. On this basis I'd expect a new waitlist to be created after autumn interviews later this year, and so if you're still interested you'd need to continue to interview each recruiting period.
Obviously if you want the best advice, email or ring yummy jobs (presuming you're from the UK or Canada or contact the relevant agency for you're region) and they'll clarify the situation about waitlists, on here we're just fellow applicants, participants and past alumni.
The waitlist for this current recruitment runs until Feb '10 (so 6 months from Sept) The next set of applications are being reviewed in August, but you can not reapply whilst on the waiting list, its one or the other.
