You may not get called back - you could just get your contract in the mail, no further calls needed. Human resources is really stretched to contact everyone, and if there is no problems with your application or anything, you may just get the contract. The first two years I worked there, I always got the telephone interview, but then the last two years (one of which I couldn't work after all) I just got the contract in the mail, no questions asked. It may be a little out of the ordinary for your first year, but don't stress over it. Wait a week, then call again if you still haven't gotten it. :)
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/