your mother on 21 May 2007
Yeah, seems to still be a ways off from normalization, but it does seem to be starting. In your case, I'd say another few months, but I don't think your shop will continue selling out by Christmas - I think it will spike during summer vacation, slump/normalize around September (going back to school?), then spike again for the Christmas shopping frenzy.
/opinion
In any case, perhaps you should start doing your own chart tracking and post your numbers in an excel file or something - could be interesting.
What numbers do you have for the PS3 and 360? Anything at all?
