[leapius]

Nice ideas! Some of them I had already implemented the same way in fact. Currently I have shipping and billing in one step - the only reason I could see for not splitting them up is that they can be different people / addresses so making them repeat an email address there might be confusing.

Right now an order number is displayed on completetion as you have described (and also emailed to them) so it's not fatal if the email address was wrong as they have a chance to note the order number down by other means. I do like the idea of telling them where the information has been emailed and giving them the option of re-sending it to a corrected address.