Help with an awkward follow-up call?

Nah you already called. If you do it again they are going to get annoyed. Plus it isn't a good idea to basically "threaten" that you are going to have to work for Eddie Bauer. Go to the interview and see how it works out. One loophole you may have is if you are currently employed or have some volunteer thing going on or whatever you can tell them you need a 2 week notice. Or you can take the job and if Pacsun offers you a job you quit Eddie Bauer and go there. It sounds mean but people do it all the time.