Forum Moderators: not2easy
If it were an entertainment/info type site, I probably wouldn't mind too much though.
If you can also give them a preview, all the better. If nothing else, perhaps show a couple screen shots so they can at least get their feet, err ... eyes wet.
Good luck.
I don't think a redesign would get you any publicity nowadays, except if it is not only graphical but also functional.
If there is no risk that users might not find the content they used to find, I would let it be a surprise.
I didn't warn warn any of my regular customers, however I did leave the navigation structure in the same place on the page and the buy buttons in the same place. There were some major changes also; older cookies were ignored, the shopping basket pages went from four pages of forms to just two (including the credit card processing page) and the add to basket button now takes you straight to the basket (it used to just alert the user that an item had been added).
I did expect some compaints, but I got none - maybe that's because the navigation was so similar except for the basket and checkout, which was made simpler and easier.
I have no expertise at shopping sites, but I do know that about every six months I am going to be blowing a gasket at Costco when they do their inevitatable biannual floor plan change. Drives me crazy! You just get to the point where you can remember where everything is so you can get in and out without doing any searching, and then they change everything around. Somebody should be fired!