Marshall - 4:55 am on Feb 27, 2012 (gmt 0)
In my 12 years of ecommerece, I can honestly say I have never had a complaint about not receiving a shipping notification. Could be just dumb luck, but I do like you idea about texting. Thing is, I send the tracking information in the email with a link, something that doesn't work in a text. Still, good idea. tweating it though, IMHO is not.