I'd second Comanche7 on that. Interview as soon as you can, if you look good, they won't put as much effort into interviewing people after you.
And as he says; this is no time for sitting back waiting. Apply for jobs every day. If you are going through agents; ring 'to confirm' they got your application. And if they want to chat; great! you want them thinking of you when a job comes in and not bothering to look on the database.
The Sock