After you create an approval, have the ability to save the names/emails to a list (which can be edited) for later use.

Before I make a decision to signup for this service I would like more information. Perhaps on your website it would help if you added more screenshots of what ApproveForMe has to offer. One picture on the Home page is not enough.

I would like to receive an email notification when someone approves the document I shared with them. Otherwise I have to keep logging in and refreshing the page to see if everyone is done reviewing. I will not be able to adopt this tool until this feature is available.

It would be helpful if there was an order to the approvals, for example on Invoices, the first approval should be from the person who initiated the purchase, and then a second approval from the manager.

Showing at least the first page of the document and then showing who has approved/declined/not responded to the document for filing.

I want to be able to send documents for approval right from within Word. More: http://msdn.microsoft.com/en-us/office/apps/fp160950.aspx

Ability to set / schedule reminder emails to required approvers

I (or my approvers) don't use Gmail or Google Apps for work, so allow me/them to login with non-Google email addresses.