This is common. I've heard that some are waiting many weeks (or even months) to be granted a slice. The slicehost folks have recently introduced an option to prepay for your slice, bumping you up the queue.
I was lucky to get a slice the moment I signed up for it (early adopter I suppose). I have been very happy with their service.
I was lucky to get a slice the moment I signed up for it (early adopter I suppose). I have been very happy with their service.